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The quasi-optical network (QON) system generally requires that it has a feature of multi-frequency and multi-polarization for transmitting or receiving more channels in a small space to reduce the satellite load. The wire grid polarizer (WGP) can be mainly used into separating double different signals with horizontal polarization or vertical polarization. Due to its frequency irrelevant attribute,...
A dual-polarized wideband substrate-integrated-waveguide fed aperture-coupled slot antenna array for 60 GHz is proposed. By cutting a semicircle shape on the edge of the crossed-slot antenna, the impedance bandwidth of the proposed antenna is effectively widen and achieves overlapped bandwidth of 16.7% for simulated |S11| and |S22|. In addition, over 35 dB isolation between two polarization and low...
This paper proposes a planar high-gain circularly polarized element antenna that can be used for array applications. The substrate-integrated waveguide (SIW) cavity is designed to support dual-resonant modes, the ${\bf TE}_{{\bf 120}}$-like and ${\bf TE}_{{\bf 210}}$-like modes, for the implementation of circularly polarized radiation performance. Four rectangular radiation slots and a large perturbation,...
A multiband compact planar terminal antenna is designed and proposed in this paper, which is suitable for multi-functional wireless communication systems. The proposed antenna consists of a patch with two slots on it and a meandered strip loaded on the top. Two parasitic stubs are etched at the back of the antenna to widen the operating frequency band. The operating bandwidths of the antenna cover...
In this paper, the detailed design procedure for two operational amplifiers (OP-Amp) used in charge pumps (CP) is presented. Such procedure, which is from system-level specifications to circuit-level requirements, provides a general methodology for OP-Amp design in CP. The design was simulated in a 0.18μm CMOS process and occupies a layout area of about 200μm×100μm. The simulation results show that...
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