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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - A Fully Planar Substrate Integrated Probe-based Wideband Orthomode Transducer
摘要： This paper introduces a planar orthomode transducer (OMT) using substrate integrated waveguides (SIWs) and substrate integrated coaxial lines (SICLs) that is entirely contained within two substrate layers. SICLs form a quadruplet of probes inside the metal waveguide with fully symmetrical geometry. Such a structure is smaller and lighter than a waveguide OMT, its construction is simpler than of a coaxial OMT, however, isolation and loss properties are less degraded compared to the use of planar unshielded technologies such as microstrip. A new wideband inline SICL to SIW transition has been developed to allow grade separation of SIWs belonging to opposite polarizations through different integrated substrate layers. The designed substrate probe-based OMT on RO4003CTM substrate covers the frequency band from 8.1 GHz to 12.5 GHz with return loss higher than 19 dB, insertion loss less than 1.2 dB, inter-port isolation higher than 62 dB and cross-polarization discrimination higher than 65 dB.
关键词： planar,orthomode transducer (OMT),transition,substrate integrated coaxial line (SICL),substrate integrated waveguide (SIW)
更新于2025-09-04 15:30:14
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Wideband Millimeter-Wave End-Fire Magneto-Electric Dipole Antenna Fed by Substrate Integrated Coaxial Line
摘要： A wideband millimeter-wave magneto-electric (ME) dipole antenna with end-?re radiation, which is fed by the substrate integrated coaxial line (SICL), is designed, fabricated, and measured. First, the ME-dipole antenna excited by a planar L-probe is presented to realize wideband performance. Then, a wideband impedance conversion structure is used to connect the antenna and the feeding port. A simple conversion structure for the SICL to the grounded coplanar waveguide is used for the antenna test. Finally, the simulation and measurement results validate the proposed end-?re ME-dipole antenna. The overall bandwidth is greater than 40% considering both impedance bandwidth and 3-dB gain bandwidth.
关键词： wideband antenna,magneto-electric (ME) dipole antenna,substrate integrated coaxial line (SICL),end-?re
更新于2025-09-04 15:30:14