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A broadband dual-polarization antenna element is presented in this paper. It contains four square-loop radiator dipoles and the quarter-wavelength balun. The antenna achieve a common impedance bandwidth of 1.54GHz-2.5GHz(S11<-10dB) at the input port, it has good performance in the isolation, which is more than 28.7dB, the gain of the antenna is above 8.2dB. In the entire operating frequency, the...
In this letter, we present a simple design method for dual-band bandpass filters (BPFs) with two independently controllable bandwidths. The proposed design is based on hybrid resonators which have both series and shunt resonances. For compact size, an interdigital BPF type is utilized. The simple design procedures are established based on an equivalent lumped circuit of the proposed dual-band BPF...
We present a balanced dual-band bandpass filter (BPF). The proposed filter is established by using half-wavelength resonators loaded with a lumped series resonator. To verify the operation of the proposed resonator, the differential-and common-mode equivalent circuits are extracted and studied. Moreover, to enhance the common-mode suppression, a lumped resistor is added to the half-wavelength resonator...
WiMAX Mesh networking is of many advantages for intelligent transportation systems (ITS) applications. In long-hop-distance ITS networks, multi-channel transmission may alleviate problem of insufficiency of bandwidth when a network uses single frequency channel. This paper presents algorithm of multi-channel bandwidth allocation in WiMAX mesh networks. Simulation is carried out with a maritime simulator,...
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