Patent ID: 8786508

Claim:
A coaxial radio frequency (RF) feed horn comprising: an inner RF feed horn having an inner geometry with an irregular, aperiodic profile configured to: excite from a first RF signal introduced at an input to the inner feed horn higher order modes that combine with a fundamental mode of the first RF signal such that the first signal has a substantially Gaussian beam profile at an output aperture of the inner feed horn, and excite from a second RF signal introduced at the input of the inner feed horn higher order modes that combine with a fundamental mode of the second RF signal such that the second signal has a substantially Gaussian beam profile at the output aperture of the inner feed horn; an outer RF feed horn, wherein the inner feed horn is disposed inside and coaxially with the outer feed horn; and a surface having an inner geometry with an irregular, aperiodic profile configured to excite from a third RF signal introduced at an input of the outer feed horn higher order modes that combine with a fundamental mode of the third RF signal such that the third signal has a substantially Gaussian beam profile at an output aperture of the outer feed horn, wherein a frequency of the first signal, a frequency of the second signal, and a frequency of the third signal are different one from another.