Sreenath .R

10 Questions 7 Answers 0 Followers

Questions related from Sreenath .R

How to calculate the coupling matrix of an substrate integrated waveguide (SIW) filter?

Hello everyone, Can anyone help me in calculating the coupling coefficients or coupling matrix of a resonator filter? SIW filter is a kind of resonator filter. Below are the papers, where a...

01 January 2020 8,696 0 View

Why patch antenna is replaced by dielectric resonator antenna (DRA) at higher frequencies like above 28 GHz?

Whenever I ask this question to my colleagues, they are replying that the metallic losses will increase at higher frequencies and so patch antenna efficiency is very less. Hence, they are...

03 May 2018 4,060 23 View

Is it possible to measure the radiation pattern of an antenna using RF Vector Network Analyzer ?

I measured the radiation pattern of a patch antenna using Agilent N9923A Vector Network Analyzer (VNA). The measurement setup involves: 1) Connecting horn antenna at first port of VNA (horn...

31 August 2017 6,249 6 View

How to calculate copper losses and dielectric losses of designed PATCH ANTENNA in HFSS software ?

I designed one microstrip patch antenna on FR-4 substrate in HFSS software. It is giving radiation efficiency of 45 % and return loss of -12 dB at 3 GHz. This low radiation efficiency may be due...

05 August 2017 4,357 3 View

How to measure the Radar Cross Section of patch antenna practically using VNA or PNA, Anechoic chamber and Transmitting and receiving antennas ?

I designed a simple patch antenna of size 50 x 50 mm with FSS . Now I want to measure the RCS (monostatic and bistatic) of this patch antenna practically to validate my simulation results. Is it...

21 April 2017 164 3 View

How to calculate Radar Cross Section (RCS) with respect to frequency in HFSS ?

I found a tutorial in HFSS from which we can calculate RCS (dB) with respect to theta and iwavetheta (deg) (for both monostatic and bistatic RCS). With respect to frequency, how we can calculate ?...

15 March 2017 1,067 4 View

Relating to Gain of an antenna with respect to direction ?

If you design an antenna in HFSS, chances are there that it can radiate in any direction (with respect to theta and phi). My question is why antenna gain is more in other direction than its...

09 March 2017 3,245 7 View

Why metamaterial absorber characteristics (like absorptivity) depends on the length of air box in HFSS design ?

I am using copper plate at the back side of my design. And I vary the length of air box (which is used to assign master/slave boundaries and for incidence of wave through floquet port) at the back...

14 March 2016 8,748 9 View

How do I achieve TE polarization and TM polarization in HFSS?

I am designing Metamaterial absorber in HFSS. I want to see my absorptivity results for both TE(perpendicular) polarization and TM(parallel) polarization. How I can see that in HFSS

16 September 2015 2,229 2 View

How can I draw an equivalent RLC network to a metamaterial absorber?

I designed a meta-material absorber in HFSS. But i don't know how to draw its RLC network and how to find out the RLC parameters. And how to prove this absorber exhibits meta-material...

23 June 2015 2,207 3 View