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

Which parameters I should change in yagi antenna to get the impedance to 7.5 ohm from 50 ohm without degrading the performance of an antenna?

I have a 3 element dipole fed yagi antnna working at 50 ohm at 2.45 GHz. I want that impedance to be 7.5 ohm without degrading the performance of an antenna. So which parameters of an antenna I...

06 July 2017 9,135 3 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

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Why should we choose deep learning to machine learning? Why is CNN better for image classification? Can I get Typical Answer?

What Characteristics makes CNN work better?

03 March 2021 1,458 4 View

What are some of the research gaps in machine learning and artificial intelligence in africa?

i would to know some of the research gaps in the artificial intelligence field in most african countries.

03 March 2021 6,145 3 View

Anyone plz suggest relevant topic for research in image processing+Deep learning.?

I have selected brain tumor images ...but now found that already lots of research done n this topic.

03 March 2021 5,774 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 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