How to stop oscillation in power amplifier?

I am trying to bias Toshiba TIM1314-9L Power amplifier. When I start biasing up it shows short and I think oscillation is happening. How to prevent oscillation and bias this amplifier?

06 July 2019 2,638 1 View

What can cause degradation in microstrip filter response in a BUC?

I have two microstrip filters in Ku band BUC. One is 5th order edge coupled bandpass filter which has 4-5 dB insertion loss and 15 dB rejection. Second6th order highpass filter is stepped...

04 May 2019 8,664 1 View

How to design a radio transmitter for a small, low power IoT device whose operating band is 2020-2025 MHz with channel bandwidth of 1 MHz??

This transmitter's instantaneous available DC power from batteries is 5W, the required transmit power is 28 dBm and the peak-to-average-power ratio is 4 dB. This design must cover all components...

01 February 2019 7,593 8 View

How to learn Altium software completely within a week?

I want to learn Altium software within a week. Can someone please suggest me good material or website?

10 November 2017 9,168 1 View

What is a good position to add a capacitor in yagi antenna to control the complex impedance?

I want to add a capacitor in yagi antenna in CST so that I can control its complex impedance. i have achieved 36-3j but I want it to be 36+24j. In order to change just complex part, I want to add...

05 June 2017 10,025 2 View

How to get complex impedance in 7 element yagi antenna?

I have a GaN power amplifier of 50 watts and have one 7 element yagi antenna which is operating at 2.45 GHz and there is a output matching network in amplifier. I have to remove that matching...

04 May 2017 5,568 4 View

How to find length and width of Stepped impedance resonator in BPF if i just have value of L and C? its from the paper i have attached here.

So i have values of L and C here. And I need to length and width. Expressions are there in the file. But i am not able to understand how they calculated. So can someone please explain me how they...

02 March 2017 5,430 1 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

Which SAR dataset to use for generating coherency matrix and performing target decomposition (Description) ?

Working on chandrayaan-2 DFSAR data, there are three datasets available: 1) Slant range image data product: The slant range complex image file. Each pixel is represented by two 4-byte floating...

02 March 2021 8,481 3 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View

Does the circuit modeling for planar monopole antennas using Foster canonical forms give good approximation?

Hi researchers, I am searching for some accurate way to do the circuit modeling of planar CPW-fed monopole antennas. I have gone through the literature where mostly circuit modeling is done using...

28 February 2021 7,016 1 View

Microstrip antenna design tutorial of HFSS 3D layout module ?

I have designed a 24 GHz rectangular antenna on HFSS 3D model and got desired results while desing the same antenna with same dimensions I am getting resonance frequency at 27 GHz I am...

28 February 2021 4,426 2 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

How to improve and implement WBAN MAC and Radio modules under Castalia 3.2 ?

Hello researchers, Hello Castalia3.2 researchers I am a beginner with Castalia, I work on optimization of RFID systems used in wireless body networks. I simulated a WBAN with 10 nodes and one...

28 February 2021 400 1 View