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The traditional geometrical depolarization model that single transmitter to single receiver provides a simple method of polarization channel modeling. It can obtain the geometrical depolarization effect of each path if known the antenna configuration, the polarization field radiation pattern and the spatial distribution of scatters. With the development of communication technology, information transmission...
A planar 4×12 slot array antenna is designed with a cosecant squared pattern for millimeter-wave communication system in this paper. The array antenna is operated with a 10dB return loss bandwidth of 42–43GHz. Twelve element antennas are arrayed in E-plane and the feeding distribution is optimized to synthesize the cosecant squared pattern. The measured cosecant squared region covers up to 40 degree...
This paper reviews some recently developed compact wideband bandpass filters based on the multilayer liquid crystal polymer technology, including multilayer lump-element bandpass filter, multilayer multiple-mode filter and multilayer lump-element-resonator bandpass filter. Miniature techniques using the multilayer topologies on multilayer liquid crystal polymer substrates are described with some examples,...
This paper proposes a planar antenna having two realizable circular polarizations. The proposed antenna can radiate with either right hand circular polarization (RHCP) or left hand circular polarization (LHCP) by using different feeding ports. The substrate integrated waveguide (SIW) cavity is used in the antenna designs, and a single grounded coplanar waveguide (GCPW) is employed as the feeding element...
This paper reports some investigations on the millimeter-wave conformal antennas. A hybrid optimization method was used to implement the conformal antenna design. The substrate integrated waveguide (SIW) slotted antenna was adopted as element antenna. The standard genetic algorithm (GA) is used to synthesize amplitude and phase weights of elements to satisfy the specified beam width and sidelobe....
The sewage plant secondary effluent is full of low cold and heat energy, drawing cold and heat energy by direct sewage source heat pump and using it can provide heating in winter and cooling in summer. This paper introduced technical solutions of the direct sewage source heat pump system, besides, it gave the evaluating method of sewage effluent cold and heat energy - the hourly analysis method, taking...
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