Interference Cancelling Receiver Having High Angular Resolution Intercept of Transmitted Radiators.
DEPARTMENT OF THE ARMY WASHINGTON DC
Pagination or Media Count:
One of the major concerns of designers of antenna system communications links is the elimination or reduction of external interference sources such as jamming, self-interference, atmospheric noise and man made noise. As is well known, most arrangements which attempt to resolve these problems of external interference do so in a relatively complex manner, often utilizing very large directional antennas andor with antennas having hundreds or more elements. This problem of external interference is particularly prevalent in the are of mobile communications systems where omnidirectional antennas are employed because of the large number of users operating in the same frequency band and because of multi-path. There is shown and disclosed a transmitter for use in mobile subscriber multiple access system where the power output of the communications transmitter is fed to both an omnidirectional antenna and a notch antenna having a single null over a small angular beamwidth with the combination developing a relatively narrow beam of radiation at the location of the null.
- Electrical and Electronic Equipment