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A multi-band orthomode transducer design, which covers 89, 36.5, 22.3 and 18.6 GHz, the general operating frequencies of microwave radiometers, is presented in this paper. Excellent impedance matching and polarization purity are achieved across all the frequency bands. The coaxial-type orthomode transducer-junction can provide adequate isolation between ports of different frequencies, and avoid serious...
In this paper, a power divider is proposed. The presented divider consists four varactors and two microstrip lines. The divider has four ports, port 1, port 2, port 3 and port 4. Port 1 is the input port, and port 3, 4 are output ports. Besides, port 2 is the isolated port. When the capacitance of the four varactors is 0, the power is outputted in port 4. When the capacitance of the four varactors...
A dual-polarized conical dielectric resonator antenna with hybrid feed mechanism is presented. The design for the proposed antenna excitation structure consists of slot fed by a microstrip line and a coplanar waveguide (CPW), providing the orthogonal polarizations. Dual-polarization can be well matched with the common −10dB impedance bandwidth of 1180MHz (24.4%). The overall dimension of the proposed...
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