A microwave radio assembly is described including a directional antenna wherein the installation and aiming is simplified. The assembly is attached to the wall-mount fix via gimbals mechanism with one rotation axis for azimuth and one for elevation and the assembly preferably includes a sight mechanism including a pair of visual apertures is located in the radio assembly in a line parallel to the radio antenna radiation direction. The radio assembly further includes a modulation cancellation scheme in full duplex mode.
RELATED APPLICATION
This application claims priority under 35 U.S.C. .sctn. 120 from and is a divisional application of U.S. patent application Ser. No. 10/423,154 filed on Apr. 24, 2003 now U.S. Pat. No. 6,937,666, entitled "Wideband Digital Radio With Transmit Modulation Cancellation" which claims priority under 35 U.S.C. 119 from U.S. Provisional Patent Application No. 60/435,839 filed on Dec. 20, 2002, entitled "Wideband Digital Radio With Transmit Modulation Cancellation" which is incorporated herein by reference.
An RF front-end circuit includes a directional coupler, a mixer, and a reflection circuit. The directional coupler is adapted to receive an antenna signal and an oscillator signal. The mixer is coupled to the directional coupler to receive the antenna signal and is further adapted to receive a mixer signal and to generate an output signal related to the antenna signal and the mixer signal. The reflection circuit is coupled to the directional coupler to receive the oscillator signal and is adapted to reflect at least a portion of the oscillator signal to the mixer via the directional coupler to counteract a parasitic portion of the oscillator signal received at the mixer.
