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# Lumped Element

177 Threads found on edaboard.com: Lumped Element

## How to use Optimzer to build a lumped element model in ADS?

Hi all, I have a S2P files and would like to build up a lumped element model to describe performance. How could I do that in ADS by using Optimizer? Thanks a lot!

## Antenna terminated in an impedance

since an antenna is, by definition, an electrically large object, you can not do a lumped element analysis of it. WHY would you want to terminate an antenna anyway? that would reduce the transmitter efficiency you heat up your termination.

## 100 ohm resistor in Wilkinson power divider in HFSS

I do not know HFSS, (I'm a CST type). Search on "ohms per sq". The length/width and ohms per sq define the resistance. Dimensions of the resist and thermal conductivity also defines the amount of power dissipated. Power dissipation may or may not be an issue to you. As a first approximation, throw an ideal lumped element resistor in to opti

## Matching Network with dipole antenna

Hi all, Please, How can I use lumped element on a port for impedance matching purpose between a discrete port and dipole antenna in CST? How can I connected the lumped element, discrete port and antenna together ? what I use to connected them?

## Why 50 Ohm Impedance Doesn't Really Matter At Low Frequency

if the frequency is low, then the length of line between the load and the transmitting device is "electrically short". Under this boundary condition, the entire circuit can be approximated by lumped elements. In this case you would terminate the circuit in the lumped element load that gave the most transmitted power, (...)

## Designed a LPDA and I have a weird looking Gain Pattern

I have designed a 10 element LPDA and I want to achieve around 6-7dB of gain but I am getting an issue with the gain plot (see attached). It looks like there is some null on the PHI axis. I am feeding the antenna with a coaxial line and a lumped port at the end. I honestly have no idea why it is doing that... Hope someone on here can shed some ligh

## applying T network in hfss

If you included a picture and described your BCs, it might be easier to double check your work. From what you described, it sounds like you are on the right track making 2D structures and assigning lumped element RLC boundary conditions. It is correct to connect the series ends of the T to the core conductors of the microstrips and the parallel por

## [HFSS V14.0] How to match lumped ports?

Hello everyone. As a small test of the effect of port shape and size on their value, I've built a simple current loop of random dimensions with a capacitive element to make it a resonant structure at 128MHz. Looking at the eigenmode analysis result it behaves like it should. However, when I want to inspect its frequency behavior through a lumped po

hi, matching can be done using a shunt resistor. however the this matching network will incur high loss. lumped element matching is preferred but matching 500kOhm with 50ohm is impossible using lumped element.

## What is difference between lumped element and distrubuted element model and its defn

What is lumped element model and distributed element model. How lumped model is different from distributed model. lumped elements means one can distinguish inductors and capacitors as separate components. When one cannot, like in line sections or waveguide sections, and optical (...)

## help : How to design monopole antenna omnidirectional CST MWS?

hi the problem with this kind of design is matching. there is two way i know first one is based on lumped element matching. second one is increasing antenna diameter.

## How to use Lumped elements with ports in CST

Hi, I want to use lumped element on a port for impedance matching purpose. I used a discrete port and then I used a lumped element. When I tried to simulate I get this error."The discrete port 1 has the same mesh location as the lumped element element1." Then I used (...)

## CST MWS 2014 - Lumped Element Anomaly between Frequency and Transient Solver

Hi All Would somebody be able to help answer the following question: I use here a simple square loop in MWS layout window to illustrate the problem. With a port placed in a gap in loop and snapped to corners of structure, I see a imaginary impedance of ~ 180 Ohms @ 2.4 GHz. This corresponds well with a first order approximation of the loop in

## Can we simulate far field in ADS EM Co-Simulation with lumped elements?

A friend of mine is designing an antenna with lumped elements and diodes mounted. The spice model of the diodes can be found in the internet. In his design, he needs to choose a proper bias to achieve his goal of the gain or bandwidth of the antenna, or something else. I found that the EM Co-Simulation in ADS is very convenient in designing a proje

## Simple Dipole Balun Issue

I'm building a simple half-wave dipole in HFSS. I first made a model with a lumped port in the center to find a good length/radius. I then attempted to implement a full design using an "infinite" balun - I.E. I run the coax through one element of the dipole and attach the outer conductor to one end and the inner conductor to another. The iss

## Does it usually happen that the simulated result and the measurement are not the same

I recently designed a S band LNA. But the measured result is far more different from the simulated one. Luckily, I can change the amplifier into a L band amplifier by replacing some of the lumped inductors and capacitors(all from murata). But after I do the same process in simulation, I still cannot obtain the result from measurement. So I have

## Netlist extraction from HFSS

Currently, I'm trying to start work with HFSS software. I did simple stripline and I want to export it's model to cadence virtuoso. I can export it by s2p file and use it with nport, but I want to get it in a netlist view too. So, I found there are two able spice netlist types: full wave spice and lumped element low bandwidth netlist (by the w

## Simple Wire Dipole Resonance problem

Hi, I have a wire dipole antenna which i modeled as a driven element for a yagi at 2.45 GHz. When i was modelling in hfss i used a lumped a port between two wires. But when i built it on an SMA it seems like there is an extra resonance introduced to the dipole right after the main resonance. Does anybody has an idea about the source of the prob

## [moved] CST Discrete Port Problem

Hi, I wanna ask, when I try to edit (resize) the dimension of copper element of RF coil which is has some lumped elements, placed by pick point, I never get the result. There always notification "No points picked for location of discrete port". Then I try to delete the lumped element first, but also I get (...)

## I'm getting an error "there are no ports connected to the circuit ..." in momentum

Hi Do you have set the ports in the Layout Layer 05_comp ? Please double check the ports setting are correct. if you want to simulate microstip line with lumped element in the moment, the ports are must following setting rule of ADS. thanks