Hi Higgler,
how would you feed the patch with 4 feeds for one polarization? At present I use 2 feeds (180° out of phase)for the V-polarization, like that:
________________
- 0 -
- -
- -
- -
- -
_______0_________
0= Feeds...
Dear All,
does anybody know ways to increase the cross polarization supression of a single microstrip patch antenna?
The following technics are known:
1. Feeding the patch with two feeds. One feed has 180° phaseshift.
2. Bending the corner of the patch.
Regards DenVo
All of you know, that the scan angle of the phased array antenna is depending on the element pattern of a single element.
By building a subarray we would get a new element pattern, with a main lobe and sidelobes.As a general rule , the beamwidth is very narrow.
But if I design now a subarray...
Dear Everybody,
does anyone know how to stablize a 7 GHz up-converter output signal?
The up-conversion works in two steps. 180MHz is first IF and 570 MHz is the second IF. Now we noticed a level imbalance of around +- 1.5 dB on a temperature range of +-30K.
Design is in MMIC.
The goal is...
Hey everybody,
has somebody of you experience in building LFOV (Limited Field of View) arrays?
My design has a 4x8 patch matrix with lambda/2 spacing.
The patch element has a 3dB beamwidth of around 105°.
Which field of view you would expect by assuming a very clever amplitude and phase...
the following sentence is not true:
if circular polarization is desired by using a truncated patch, please also take care of the field vector strength from h and v. If both are not exactly the same you will generate elliptical polarisation.
so its right:
if circular polarization is desired by...
within a truncated patch the horizontal and vertical edge will be excited. The horizonal electromagnetic field vector and the vertical em- field vector are 90° out of phase, which produce the circular polarization.
by the way the 90° phase shift between h- and v- vector or vice versa defines...
Hey Higgler,
nice that you are open for discussion. Indeed I simulate/optimize the design by using CST.
The single patch is part of an array with arround 32 patches in one subarray.
What should I do with the backwards energy? I optimized the design for low back radiation and good cx-pol...
Hey Higgler,
thank you for your response. I try to give you a better picture of the design.
This X-Band antenna is a multilayer structure with around 4 substrates. On the separate substrates are the radiating patches which are pin coupled for V-Polarisation and EM- coupled for the...
Dear Experts,
I am designing a patch antenna in X-Band. This patch is a multilayer aperture coupled (H-polarization) and pin coupled (V-polarization) patch antenna which uses distances between the patches and the reflector plane. The patch is designed for good cx-pol suppression in both...
Dear funnygril,
the microwave oven is usually working in cw (continious wave) mode using an rotating dipol antenna at the top. Frequency is S-Band (~2.3GHz).
You could implement a small receiving antenna probe on the side wall to measure the energy. The antenna structure should be robust...
