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A two-element series-fed metamaterial rectangular microstrip array of broadband and high-gain is proposed, designed, and fabricated. Arranging metamaterial patches to a series-fed array shown is demonstrated to have significant improvement of the antenna performance in terms of bandwidth broadening and gain enhancement. The array also inherits the high efficiency and low loss advantages of the metamaterial...
In this paper, a new inkjet printed wideband 3 dB branch line coupler is presented and compared with the identical coupler circuit fabricated in the conventional etching technique. The coupler circuit consists of four γ/4 open circuited coupled lines in a suspended microstrip structure, a conventional squared loop circuit in a microstrip structure, and a transition between these two different transmission...
A broadside-coupled structure is used to build a planar bandpass filter with ultra-wideband (UWB) performance. The design is aimed at achieving a passband that covers the frequency range from 3.1 GHz to 10.6 GHz as required by the modern UWB indoor and outdoor communication systems. To achieve a wide upper stopband, a stepped impedance resonator is employed to suppress the harmonic responses outside...
In this paper, a reconfigurable microstrip patch antenna with RF pin diode switches is implemented for dual band of 2.4 GHz and 5.6 GHz Software Defined Radio (SDR) applications. For the dual band SDR system, the use of a single antenna with a wide bandwidth to cover both of the bands can be limiting for low power level signal applications due to wideband noise. A reconfigurable nested microstrip...
We have presented the design and full-wave analyses of a frequency reconfigurable antenna in response to public safety communities' mobile wireless communications applications. The antenna, MRA patch, can be tuned to operate at 0.8 GHz, 2.4 GHz and 4.9 GHz frequrencies. The MRA patch exhibits very similar gain and well behaved radiation patterns at each frequency band. The design and microfabrication...
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