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In this paper, a 1×8 active antenna array based on frequency shiftable vector modulator (FSVM) module is demonstrated. The FSVM module can flexibly shift the operating frequency band of the vector modulator (VM) while not deteriorating the signal performance. By employing the FSVM module, a 1×8 active antenna array with a RF path beamforming structure is developed. Since the magnitude and phase of...
A printed log-periodic dipole antenna (PLPDA) with multiple notched bands is proposed for ultrawideband (UWB) applications. The impedance bandwidth of 3.1 GHz-10.6 GHz with VSWR less than 2 is achieved based on the wideband property of the PLPDA as well as the half mode substrate integrated waveguide (HMSIW) Balun. Different from omnidirectional UWB antennas, the end-fire radiation pattern of the...
A planar UWB monopole antenna with double notch frequency bands is presented. The proposed antenna consists of a planar monopole antenna and two L-shape slots which are used to generate two notch frequency bands. The bandwidth of the antenna is from 2.5 to 10.75GHz, while the proposed antenna has two notch bands of 3.35-3.75GHz and 4.85-6.1GHz, which cover 3.5GHz WIMAX band from 3.4GHz to 3.69GHz...
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