Abstract: An outdoor microwave radio, which supports two channels aggregation, includes a cable interface, a radio frequency processing section, and an antenna coupling section. The cable interface includes two cables, each cable configured to receive an analog intermediate frequency signal from a modem output at a remote indoor microwave radio. The radio frequency processing section configured to process the two analog intermediate frequency signals into one analog radio frequency signal. The antenna coupling section includes a co-plane circulator for connecting to an antenna and transmitting the analog radio frequency signal using the antenna.

Abstract: With the introduction of this two channel aggregation RFU architecture, a series of new trunking configurations are proposed. Comparing with existing tracking radio configurations, this two channel aggregation radio architecture has the following key advantages: compact 4+0, 6+0 and N+0 trunking radio architectures; an innovative compact 2+2 XPIC trunking radio architecture; a new 2+0 standby radio architecture; an extremely compact N+0 and N+N radio architectures; 5. the feasibility of many higher order N+0 and N+N XPIC compact configurations; the feasibility and possibility that the whole trunking radio can be directly mounts to the antenna, largely boosts the overall system gain by removing this flexible waveguide between antenna and traditional trunking radio. Single two-channel aggregated RFU with two-channel aggregated modem can support up to 4 56 MHz RF channels. With 4096QAM modulation, single RFU can support up to 2.5 Gbits/s throughput.

Abstract: A compact antenna feeder and associated circulator plate are disclosed. The antenna feeder includes: an orthomode transducer (OMT) polarizer, a first circulator and a second circulator. The OMT -polarizer includes a septum, a first port, a second port, and a third port. The first circulator is coupled to the first port of the OMT polarizer to define one orthogonally polarized microwave signal path between the first circulator and the third port of the OMT-polarizer. The second circulator is coupled to the second port of the OMT polarizer to define another orthogonally polarized microwave signal path between the second circulator to the third port of the OMT-polarizer. The OMT polarizer includes a waveguide with the septum located therein separating the two orthogonally polarized microwave signal paths. The septum has a base mounted on the circulator plate and a step-shape body extending from the base and out of the circulator plate.