Anum Ahmed Pirkani

9 Questions 8 Answers 0 Followers

Questions related from Anum Ahmed Pirkani

Where does the energy go when adaptive null is placed ni Antenna pattern?

When an adaptive null/ notch is placed in the antenna pattern - towards let's say in the direction of interference or any specific target - where does the original energy in the artificially...

16 March 2021 9,677 8 View

Digital beamforming vs Coherent Integration?

Hi All, I was wondering if the process of beamforming is the same as coherent integration. I say this because in the case of digital beamforming, we basically multiply the result of 1st FFT...

30 August 2019 8,716 4 View

64QAM Based Continuous Wave High Power Amplifier Design?

Hi All, I am working on the design of an S band continuous wave high power amplifier based on 64QAM signal. The major bottleneck for the time being is the selection of a suitable amplifier/...

20 July 2019 9,073 4 View

Significance of Spatial Frequency in terms of array antenna pattern?

Hello All, I have gone through a few research documents where I came across a term "Spatial Frequency" which is basically the sin of theta where theta is the azimuth angle ranging from -90 to 90...

17 July 2019 4,850 3 View

Mixer effect over signal phase?

Hi All I was just wondering that as a mixer adds and subtracts the input frequencies, what happends if both the inputs (RF and Local Oscillator) have a phase in them as well. How would the mixer...

28 March 2019 6,020 2 View

Antenna S11 analysis?

Hi All, I am designing an L band antenna. The S11 of antenna is below -10dB in the operational band of 1.2GHz - 1.4GHz. However, the dip of S11 is not in the operational band. It is at about...

21 March 2019 5,887 9 View

Microwave Absorber in CST?

Hi All, I have to cover some regions of my antenna with a microwave absorber in CST to observe its effects. However, I cant find any suitable pre-defined material in CST which can act as an...

10 March 2019 9,492 4 View

Can a vertically polarized antenna be used as horizontally polarized antenna?

Hi all, I am designing a curve stacked dipole antenna with following specifications. Frequency of operation: L band Azimuth: Omni-directional Elevation: 6 to 70 degrees Polarization:...

08 March 2019 6,248 3 View

Parameter identifibility for a full/ Thin array Phased Radar?

Hey All, I have been going through many researchers papers, but couldn't find an appropriate research on the comparison of parameter identifibility for a phased array Radar with full array...

10 August 2018 1,504 0 View