A variation on an existing antenna feed system for use on simultaneous C/Ku-band satellite ground terminals is presented. Multiband feed technology is usually used to Large Aperture antennas.
With the introduction of the Wideband Global Satcom (WGS) satellites, simultaneous operation in C-Band and in KU-Band will be a requirement for many terminals. Advanced Microwave Technologies Co., Ltd is a provider of multiband feeds and has developed feed systems that operate simultaneously in C-Band and KU-Band in receive.
1. Working frequency:
C band： 3.4～4.8GHz; Ku band： 10.75～12.75GHz;
2. Polarization mode:
C-band: double circular/double linear; Ku band: double linear;
The C-band feed source performs polarization switching according to the RHCP/VLP, LHCP/HLP agreed method, and the C-band circular/linear polarization is motorized switched, and the linear polarization surface can be remotely controlled motorized, and the adjustment range is ±92˚; The Ku frequency band can be adjusted independently, and the adjustment range is ±45˚.
3. Circular Polarization Axis Ratio：≤1.06；
Circular polarization≤1.25:1, Linear polarization≤1.25:1
5. Port isolation
Band isolation：50dB； linear polarization：30dB； circular polarization：20dB.
6. Feed interface：
C band：WR-229； Ku band：WR-75.
7. Feed insertion loss:
C band: ≤0.3dB； Ku band: ≤0.5dB。