Broadband adaptively-controlled polarization-separation network
Abstract
A broadband adaptively-controlled frequency-reuse system has been developed and demonstrated. The system is designed to operate at 11 GHz and above, where polarization deorthogonalization due to rain effects is a problem. Direct analog control is used to continually correct for varying cross polarization conditions. Two cancellation networks are presented; an electro-mechanical RF waveguide network, and an all-electronic IF network; each adaptively controlled using pilot signals, detecting the amount of cross polarized pilot in each channel, and nulling the signal. Cancellations of cross polarization to greater than 35 dB below the copolarized signal are demonstrated.
- Publication:
-
7th European Microwave Conference
- Pub Date:
- 1978
- Bibcode:
- 1978eumw.conf..317G
- Keywords:
-
- Adaptive Control;
- Cross Polarization;
- Frequency Assignment;
- Microwave Transmission;
- Network Synthesis;
- Wideband Communication;
- Cancellation;
- Cross Coupling;
- Electromechanical Devices;
- Error Correcting Devices;
- Microwave Attenuation;
- Superhigh Frequencies;
- Waveguides;
- Electronics and Electrical Engineering