4. The system is to be fabricated on a 1. To use this tool, enter the values for. TheThe geometry of the designed microstripline feed microstrip patch antenna is as shown in fig. A cross-section of a microstrip transmission line is shown below. In addition, if GAMMA, VSWR, or dB is known, the calculator can convert between the three. Designedge impedance calculated is 197. Hruang science invites research papers for the current edition in Science, Engineering , Technology,Pharmacy, Agriculture,Mining. This calculator will help you calculate the guided wavelength, provided the dimensions of the microstrip are given as well as the velocity of propagation, the microstrip material's dielectric constant, and the input frequency. Microstrip patch antennas (MPAs) are rapidly gaining more attention due to the proliferation of communication devices and systems with frequencies becoming more suitable for the size and performance of this type of. Press Analyze to see the results. See full list on emtalk. 05/25/2007: Printed Dipole Antenna using Ansoft Designer added in the Tutorials\Tools section. Key factors are the relative permittivity (εr) of the dielectric material, the cross-sectional area (A) of the microstrip, and the. Two points in space, specified as a 2-by-3 matrix corresponding to two three-element vectors of Cartesian. Determine the characteristic impedance Z0 at 5 GHz A: 70 Ohms B: 100 Ohms C: 300 Ohms D: 50 Ohms. 12 mm, a height of 1. Efficient. Used for various applications, "patch" is a planar rectangular, circular, triangular, or any other geometrical shape metal sheet mounted. The microstrip is a very simple yet useful way to create a transmission line with a PCB. An inset-feed rectangular microstrip antenna is proposed using 1D, 2D, 3D PCs substrate in 0. A microstrip width calculator can calculate the width of a microstrip. The microstrip patch antennas as radiating device have advantages like, low profile, conformal and low-cost. Access technical papers, white papers, calculators, tools and more for circuit laminates, prepreg and bonding materials. For microstrip patch half wavelength long, the voltage distribution is maximum at the ends, with zero at centre. Formula for Differential Microstrip Impedance Calculator (Using Zo) Where, Z d = Differential Impedance. A circular shape partial ground plane is used with an elliptical notch just below the feed line. 47 mm is needed to realize a 50 Ω with a 180 degree phase delay at 5. 06/27/2007: EM Talk Blog added. 04 in the ε eff formula for the W/H<1 case. Be aware that there are many microstrip impedance calculators on the Internet that give sometimes widely varying results. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. 2 mils then, Z d = 96. 2. It is an Excel Calculator for a Microstrip Rectangular Patch Antenna. Backwards crosstalk creates a pulse width. A simple tool to calculate parameters for an edge fed/inset fed/probe fed patch antenna or microstrip antenna. Calculation assumes that you are using a 50 Ohm microstrip transmission line. For an embedded (internal) microstrip, the formulas provided in paragraph 4. Fig. . In this measurement, a voltage source is used to excite Port 1 and the received signal at. As a result, to reduce the total noise figure the first stage device should have low-noise and relatively high gain. The voltage standing wave ratio (VSWR) calculator determines reflection coefficient (GAMMA), VSWR, and return loss (dB) for a mismatched line. 4 GHz which is applicable to. In the case of the substrate, its dimensions are 5. 0x5. 65mm. This link is listed in our web site directory since Saturday Jul 11 2015, and till today "Patch Antenna Calculator" has been followed for a total of 1156 times. 3), 0. mline = design (microstripLine,1. ” Journal of Electromagnetic Analysis and Applications. Antenna are designed with a working frequency of 3,5 GHz for 5G and 5 GHz communication systems for. 1. The advantage of the microstrip line fed U-slot patch is that it is easy to form the array. 4mm thick FR-4 (lossy)substrate with relative permittivity 4. h h = Substrate Height. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. hfss ports only solution halo i am new to hfss and actualy am confused about how to size the wave port now what i do is once i have calculated the microstrip line width i use the wave port claculator at emtalk to find the wave prt dimension than i use sole port only to find Z0 appearing at the port . The unit vector, n, is normal to the patch edge. Press Analyze to see the results. The successful execution leads us to target the commons bandwidth of wireless communication i. com Microstrip Patch Antenna HFSSv10 ( download simulation file) The microstrip patch antenna is a popular printed resonant antenna for narrow-band microwave wireless links that require semi-hemispherical coverage. Two antenna miniaturization techniques, based on the use of a Koch fractal contour and a shorting post (connecting the patch to the ground plane), are combined to enable a major size reduction. Analyze Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. Crosstalk occurs when a signal "jumps" from one trace to another, a phenomenon that is unintentional and often unwanted. Description. RF calculations and conversions include metric-standard, link. Equation (14-20a) states. Go to. 06/27/2007: EM Talk Blog added. This paper presents a high-band microstrip antenna of dimension (5 × 5 × 1) mm 3 for 5G wireless mobile communications ranging up to 40–45 GHz. i hope you understand. Initially, some common mediums of communication such as WIFI/WLAN and Bluetooth were targeted. When a Teflon dielectric substrate is used, the resonant frequency is 12. In this course, we detail microstrip patch antenna array creation as a method of design. In summary, the design process for the coaxial probe placement is simple: Select an operating frequency and stackup. The successful execution leads us to target the commons bandwidth of wireless. This calculator helps you determine the magnitude of the crosstalk that could occur on a microstrip given its dimensions and source voltage. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. A compact and reduced VHF micro-strip patch antenna with dimensions 17 × 10 cm printed on an FR-4 substrate with relative permittivity ϵ r = 4. Antenna are designed with a working frequency of 3,5 GHz for 5G and 5 GHz communication systems for. Circular microstrip antennas are used as low-profile antennas in airborne and spacecraft applications. Left-handed materials have lead to novel microwave antennas, resonators, waveguides, and lenses. Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. Feeding is extremely important with the patch antenna, and it contributes to bandwidth, crosspolarization levels, and ripple. If the ratio (L/W) is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. A microstrip patch antenna using air substrate operated at 28 GHz resonance was designed, simulated, optimized, and analyzed. THz electromagnetic wave can permit more densely packed communication links with increased security of communication transmission. The substrate parameters (ε r and h) and the frequency of interest are required. Coplanar Waveguide Calculator. 15 to 5. The proposed antenna has two cuts at two of its edges in order. It is interesting to note that one of the designs use inset feed. INPUT DATA. An arbitrarily shaped microstrip patch antennaDesign a quarter-wavelength microstrip impedance transformer to match a patch antenna of 80 Ω with a 50-Ω line. By understanding the microstrip transmission line, designers can. 78 GHz, 2. Crosstalk is unwanted coupled energy between traces. Abstract and Figures. We can choose any antenna application depending upon our requirements. Additional benefits of patch antennas is that they are easily. Figure 2. These three methods are outlined in the image below. The substrate thickness, t, is thin. 8% was observed. Note: Units do not matter for this calculation as long as they are consistent. 09/08/2007: Online VSWR calculator added. 53 is designed to have a radius of 0. For example: F=10. This paper presents a square-slotted microstrip patch antenna at 37 GHz resonant frequency for mmWave wireless communication. The stripline impedance calculator provided below is useful for gaining an initial estimate of trace impedance for striplines. I. i hope you understand. 5mm. 45/5-GHz WLAN bands. Question: A lossless microstrip line uses a 1. Microstrip Patch Antenna: From Simulation to Realization em: talk - Electromagnetics and Microwave Engineering emtalk, electromagnetics forum, electromagnetic tutorials, microwave engineering forum, microwave engineering tutorials, microstrip calculatorOverview. Analyze. One half-wavelength resonator of the high-frequency (f 2) signal path also provides port coupling function for the low-frequency (f 1. This calculator provides accurate microstrip transmission line analysis and synthesis. The substrate thickness, t, is thin. It also provides examples and references for further reading. November 6, 2020 By Bill Schweber. In this proposed paper, a single band microstrip patch antenna for fifth generation (5G) wireless application was presented. This calculator is designed to calculate the characteristic impedance of an edge-coupled microstrip. About Patch Antenna Calculator The resource is currently listed in dxzone. Intrinsic techniques, proximity coupled and aperture-coupled patches, applying horizontally coupled patches to driven patch on a single layer and stacked patches are discussed. Model of microstrip line showing cross-section. Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. The wider is the crossection of the patch the closer this point is to the edge of the patch. Noise figure is noise factor expressed in decibels (dB). Figure 1. The patch antenna developed for 436MHz by Greg (VK3BLG) in 2003 is a remarkable antenna for amateur satellite work. I was using the following calculator to try and calculate what the thickness needs to be and got a result of approx 3mm, this seems very large! I used the following parameters: Dielectric Constant (εr): 4. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. fast and gives accurate results. The phase is mostly + 90 ∘ or − 90 ∘, indicating that Zin is mostly reactive. INPUT DATA. Other parameters for circular patch Design Other parameters for designing the hexagonal shape are reactance of circular patch and resonance frequency. Introduction. Units do not matter; use same units for (w) and (h), waveport size will be in the same units as (w) and (h). The 40 data samples are used to design MSA from which details of 15 data samples have been given in table 1. 8 W/Kg has been demonstrated that outperforms than the exiting imaging methods [ 10 ]. when i insert the microstrip in patch. 4GHz to 5. 5 Microstrip Line. Identify best matched Rogers' bonding material by sorting according to design attributes. Calculates dimensions of circular microstrip patch antenna, provided frequency, relative permittivity and height of substrate. Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. The stacked patch configuration is one of the ways of increasing the impedance bandwidth of these antennas to be greater than 25% [1]. February 28, 2022 · Infinus. Use this tool to determine the the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. 04/03/2007: Microstrip Patch Antenna: From Simulation to Realization added in the Tutorials\Tools section. The meshed ground plane consist of two lines, one carrying the desired current and the other. You can start with simpler formula: L ≈ 0. Patch antenna feedline with (left) direct feeding, (center) inset feeding, and (right) coaxial feeding. These three methods are outlined in the image below. 60x1. spar = sparameters (mline,1. Millimeter wave (mmWave) wireless technology has become a part of human life for high-speed and secure data transmission. HFSS High frequency simulator is used to analyse the proposed antenna and simulated the result on the return loss, radiation pattern and gain of the proposed antenna. i need help in calculating the dimensions of patch antenna. This paper refers to a detailed analysis on the design and implementation of 4×1 and 8×1 microstrip patch antenna (array) of given specifications using IE3D software and a dielectric material FR4 with dielectric substrate permittivity of 4. The results should only be used as an estimate for the waveport size. The dimensions of square patch length L, width W are taken to be equal. Discover (and save!) your own Pins on PinterestA new technique is presented for designing microstrip patch antennas with very good input impedance matching. This microstrip patch antenna has two U-shaped slots to achieve the dual wideband operation required to meet these specifications. emtalk. A lossless microstrip line uses. Introduction. An arbitrarily shaped microstrip patch antennaType of antenna: Rectangular Microstrip Patch antenna Resonance frequency: 2. This work describes an array of a 2×1 microstrip patch antenna with 3. Patch antenna design for 5G applications as a phased array. The main category is Antenna design calculators that is about Antenna design calculators. 42 GHz and 3. Different studies have been published in this area for the amelioration of the patch antenna. Overview. 46 GHz rectangular patch antennas printed on low-cost fiberglass substrates (FR-4), mounted on a ground plane and fed by a microstrip line. The. Enter the values of trace width (w), trace thickness. 2 and a height of 1. Hi, i'm designing some microstrip antennas and i have some questions. Most claim to use some or all of these formulas these formulas, but I have discovered ones, for instance, that appear to mistakenly substitute 0. 5 GHz. F. This paper presents the design of a compact circular microstrip patch antenna for WLAN applications which covers the band 5. em: talk - HFSS Tutorial 1: Microstrip Patch Antenna A patch antenna is a miniature, surface-mountable antenna. The calculation of the length of the first dipole was carried out based on the lower operating frequency than 1. Microstrip-fed patches have very narrow bandwidths, almost invariably less than 5%. The via has a radius of 0. 2 and a height of 1. The microstrip line will be designed on a substrate with a dielectric constant of 10. 4 GHz. Index Terms-Microstrip patch antenna, MATLAB calculator, CST, 2. 3 Design Specification simulated an inset-fed rectangular microstrip patch antenna for WLAN Before designing a microstrip patch antenna, the first step is to application using CST software and a RO4350 dialectic substrate, consider the design specification of the antenna based on. To use this tool, enter the values for. The characteristic impedance (Z o) of coplanar waveguide with ground or microstrip lines with signal side ground plane can be calculated using the active calculator or the equations at the bottom of the page. 09/08/2007: Online VSWR calculator added. Description. 5. Patch antennas usually have narrow bandwidths and the 5-GHz WLAN band extends from 5. In the present study circular microstrip patch antenna is designed for the Ultra High frequency (UHF) band of 470MHz-806MHz. 8 GHz, which makes the design challenging. This paper presents the design of a rectangular microstrip line-fed patch antenna array with a centre frequency of 3. files/HFSS/MPA. Press Analyze to see the results. It also provides examples and references for further reading. Press Analyze to see the results. Placing an inset for a microstrip feedline into the antenna. (2019), the author designed and 3. 5. Equation (14-20a) states. Figure 1. Stripline Crosstalk R. Inputs Dielectric Height Operation Frequency Outputs Width (mm). Such a microstrip is constructed with two traces referenced to the same reference plane with a dielectric material between them. 214. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. Microstrip Impedance Calculator & other calculatorsThe wider is the crossection of the patch the closer this point is to the edge of the patch. 5 MHz), and 5. Wu Odd and Even mode fields in microstrip have different percentages of total field fringing through air which changes effective Er Leads to velocity variations between even and odd +1 +1 +1 . The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. Press. Analyze. The patch antenna calculator linkMicrostrip line calculator linksubstrate used: Er. These beamformer modules are available as ICs that can be used to control the beam steering angle. 1317 µm 3 1200 µm 2141. Here is a problem, I am simulating a grounded coplanar waveguide with width of 0. A microstrip is created by etching a trace on a printed circuit board and is mostly used in microwave applications. Patch. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. The substrate parameters (εr and h) and the frequency of interest are required. there is a small gap on both side of the microstrip with patch. “Microstrip Patch Array Antenna with Inset Fed and Perturbation for a 3 GHz S-Band Coastal Radar. Design a microstrip line around 1. Introduction In recent years, the microstrip patch antenna has widely been used for various specific applications in satellite communications, aerospace, radars, biomedical applications, mobile communication for GSM, and remote sensing applications [1] because of its special features like ease of analysis and fabrication, low cost, light. Millimeter wave (mmWave) wireless technology has become a part of human life for high-speed and secure data transmission. Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. The proposed antenna is designed using the artificial neural networks (ANN) method based on the multilayer perceptron structure; it is composed of a coplanar. An X-band, 12-element array of rectangular microstrip patches was demonstrated for the first time to reflect the main beam 20 degrees off broadside. Be sure of which one you finally decide to use. I could not able to upload hfss file, it says not allowed. Height: Height of the substrate. The entire microwave theory is based on Maxwell’s equations, whereas the entire electronic circuit theory is based on Kirchhoff’s electrical current and voltage laws. I altered the parameters (size, substrate epsR etc), and tried to add a microstrip line for feeding the patch. My calculation gave me that you need to place your feed at about 12. Activity points. py. Four types of antennas were simulated using Computer Simulation Technology (CST) software. This example shows how to create an AI model based inset-fed microstrip patch antenna at 4. Conclusions Antenna array concept is used to improve the better gain of different antennas by nullify the side lobes. Crosstalk occurs when a signal "jumps" from one trace to another, a phenomenon that is unintentional and often unwanted. Feeding is extremely important with the patch antenna, and it contributes to bandwidth, crosspolarization levels, and ripple. The patchMicrostrip object is a microstrip patch antenna. In this course, we detail microstrip patch antenna array creation as a method of design. Press Analyze to see the results. 29 db, return loss at 13. 45/5-GHz WLAN bands. everything RF has created a series of RF calculators to help engineers and students with common calculations that they need to conduct frequently. This document covers the theory, design steps, simulation and verification of various types of power dividers, such as Wilkinson, T-junction, and branch-line. The microstrip patch antenna can also be designed using an artificial neural network (ANN) modeling technique where size of the antenna is major limitation especially in mobile and wireless applications. The substrate parameters (ε r and h) and the frequency of interest are required. The relative dielectric constant of the commonly used FR4 copper-clad sheet is 4. 002 and height of 1. This is an approximation, it doesn't include G12, or the correction to G1 to account for the patch width. Benefits of Microstrip Patch Antenna Transmission situated operations. 0 GHz; the width of the microstrip is designed for 50 Ω and the length for a 180 degree phase delay. . This will also provide the time delay the cable provides for a signal and also the capacitance and inductance per. If you only need to convert between GAMMA, VSWR, and dB, you can ignore Zo and ZL. i need help in calculating the dimensions of patch antenna. Matin, A. more. High Integrate Broad-Band Microstrip Antenna Array Using Multilayer Printed Circuit Board (MPCB) Technology. This paper describes about the design of microstrip patch antenna over the frequency range of 3. The proposed antenna. When in doubt, use 1 for copper, . Crosstalk is unwanted coupled energy between traces. 45 GHz. The paper describes Microstrip patch antenna that consists of a half circular patch which is extended to an extra length and is fabricated on FR-4 material that uses Microstrip feeding line method for feeding. In this paper, a rectangular microstrip patch antenna is designed using HFSS software. However, I tried to simulate the exact shape of the antenna (the design from the paper) and developed the project on HFSS initially. It could also be used to control multiple patch arrays. The coaxial cable, along with the balanced two-wire, is the most common type of transmission line used in RF communications. 2 thickness = 0. Microstrip-fed patches have very narrow bandwidths, almost invariably less than 5%. The substrate parameters (ε r and h) and the frequency of interest are required. 45 for gold. This tool will also give you the magnitude of the coupled voltage between. Simons, "Coplanar Waveguide Circuits, Components, and Systems", Wiley. 1. The thickness of patch is t on dielectric substrate of height h supported by ground plane. What is a microstrip patch antenna? It is a kind of internal antenna. 4. This research proposes the design of dual-frequency microstrip antenna using the Y slot method. Using the microstrip line calculator, a width of 1. A micro strip line whose power port is adapted to 50 ohms, located on a substrate type Epoxy FR-4, excites the patch. By default, the dimensions are chosen for an resonant frequency of 15 GHz. The feed forward back 6 8 132500 Epoe hs I propagation. 45 GHz Microstrip Patch Antenna Using CSTThe patch antenna calculator linkMicrostrip line calculator li. 6 × 38 × 39. Be sure of which one you finally decide to use. A new technique is presented for designing microstrip patch antennas with very good input impedance matching. hfss em: talk - HFSS Tutorial 2: Dispersion Diagram I files/HFSS/PPWG_DD. The input impedance at the radiation edge is also computed. The results should only be used as an estimate for the waveport size. The data is generated from microstrip patch calculator [5]. 002 and height of 1. Hi, I try to simulate a patch antenna as defined in emtalk, based on altering the example Simple_patch_antenna. The coaxial cable, along with the balanced two-wire, is the most common type of transmission line used in RF communications. The printed dipole antenna is often used in planar microwave radiative applications that require an omni-directional pattern. Normally a square patch is used. 44 GHz, S11 is only around -5 dB and the input impedance is 123 + j57 Ω, which are both too high. . 85K subscribers Subscribe 3. The substrate parameters (ε r and h) are. The dimensions of antenna can be found in the HFSS simulation file. While commonly constructed using printed circuit boards, this structure can also be built using other materials as long as there is a conductor separated from. Three-dimensional far-field radiation pattern of a microstrip patch antenna (2. The required inputs are the Dk value for the dielectric constant of the PCB substrate, and the. How can you match the impedance of microstrip antenna?The rule of thumb is approx 1/3 of the distance between the two edges. The substrate parameters (ε r and h) and the frequency of interest are required. This calculator will help you calculate the guided wavelength, provided the dimensions of the microstrip are given as well as the velocity of propagation, the microstrip material's dielectric constant, and the input. 0 GHz; the width of the microstrip is designed for 50 Ω and the length for a 180 degree phase delay. Press Synthesize to see the results. 33 hz and the VSWR value is 0. Jul 14, 2016 - This Pin was discovered by Xander Snyder. The design, modeling and analysis of simulation results were. electromagnetic tutorials, microwave engineering forum, microwave engineering tutorials, microstrip calculator. Enter the relative permitivity, width of the trace, the ground plane spacing, and the substrate thickness to calculate the characteristic impedance. thank you so much. Popular answers (1) Dear Medkour, The minimum size of the PCB is calculated with the following rule of thumb. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo). Most claim to use some or all of these formulas these formulas, but I have discovered ones, for instance, that appear to mistakenly substitute 0. In order to design and simulate this array of two by one with microstrip line feed technique, the software used was the Computer Simulation Tool (CST) by Microwave. Patch Antenna Calculator. The substrate parameters (ε r and h) are required. 5 GHz and calculate its resonant frequency. 58 mV and specific absorption rate (SAR) value of 3. 5 mils (241 microns). The relation between the R, Zo, and amount of power division is given by the following formula. 2. But I get stuck at port = FDTD. If the dielectric constant of the material is not known, you can choose to put in the velocity of. The length (L) was chosen to be the same as W to obtain a. 5 GHz and calculate its resonant frequency. Legal. Inclined slot. 6mm thick FR-4 dielectric substrate with dimensions of 46. A microstrip patch antenna is one of the most popular microwave antennas. Our RF calculators and converters will provide the figures you need for your radio frequency engineering needs. The microstrip line will be designed on a substrate with a dielectric constant of 10. Its feeding mechanism is accomplished through inclined aperture slots in the ground plane. This paper refers to a detailed analysis on the design and implementation of 4×1 and 8×1 microstrip patch antenna (array) of given specifications using IE3D software and a dielectric material FR4 with dielectric substrate permittivity of 4. A microstrip is a type of transmission line in which a strip of a conducting material like copper is mounted on a dielectric material and routed to a ground plane. The 1-port EM data provides just an effective impedance between the (+) and (-) pins, and that is floating on one side. 1. This design approach helps analyzer microstrip inset-fed patch antennas and helps to locate the exact inset length for 50-? input impedance. 70. This calculator can calculate the impedance and propagation delay of the embedded microstrip. Description. Printed antennae. Coaxial Cable Impedance Calculator. It represents the ability of a microstrip transmission line to store electrical charge per unit voltage. 2 permittivity and 1. The range for antenna is chosen between 2. 8% was observed. An imaging system based on THz spectrum incorporating nanomaterial-based microstrip antenna provides better resolution at lower cost. Always perform a Solve Ports Only solution to ensure the waveport is correct. By definition, a printed antenna is one that is fabricated using standard photolithography technique. Microstrip Patch Antenna HFSSv10 ( download simulation file) The microstrip patch antenna is a popular printed resonant antenna for narrow-band microwave wireless links. Microstrip Line. 11ac 802. Model a microstrip patch antenna using two feed methods (pin feed, microstrip edge feed). This calculator is designed to calculate the inductance of a microstrip given its dimensions (width, length and the distance of. The proposed 1 × 8 arrays. The dipole arm's width (W) and length (L) will be optimized for 3. In the work of Ab Wahab et al. Analyze Enter values for W and L for a microstrip line to determine its Zo and Electrical Length. The four element antenna array has demonstrated about 16dbi gain, a remarkable figure for its compact size. 0mm FR4. This is why a low-noise amplifier (LNA) is the first active device in a communications system. This is a commonly used transmission line, as it can be cheaply fabricated using printed circuit board techniques. The antenna is fed by a microstrip line with 50 Ω characteristic impedance and. The substrate parameters (ε r and h) and the frequency of interest are required. The microstrip coupling lines provide the input/output coupling and its strength are determined by the gap width and length (S 2, L 2 and S 3, L 8). Only 2 slots were taken out of the regular patch shape, and a generic feeding line structure. Tanδ: Loss tangent of the. AddMSLPort (1, patch, start, stop, "x", "y", priority=5, edges2grid='xy') throwing an. The stripline impedance calculator provided below is useful for gaining an initial estimate of trace impedance for striplines.