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In this paper, a new method of the multibaseline interferometric SAR phase unwrapping based on the model of the optimum data vector is introduced. The method constructs the multibaseline optimal weighted joint data (MOWJD) vector by taking advantage of the coherence information of neighboring pixels in order to adaptively coregister the SAR images and then employ the projection of the joint signal...
A simple technique is developed to improve the axial ratio (AR) bandwidth and quality of circularly polarized stacked microstrip antennas (CPSMAs) using a new C-type single feed. The proposed antenna has been optimized and fabricated, and the computed results agree very well with measurements. The antenna has a 3 dB AR bandwidth of 11.6%, gain is more than 8.2 dBi and the impedance bandwidth for VSWR...
A novel circularly polarized smart patch antenna array with hexagonal elements was designed as a hub for indoor/outdoor mobile wireless computing networks. A frequency domain finite element method (FEM) was employed to design the patch antenna array using an optimization technique based on the gradient algorithm to optimize the physical structure on a finite ground plane for optimal directivity in...
In this paper, a new method of the interferometric phase estimation based on the model of the optimal weighted joint data (OWJD) vector is introduced. The method performs the optimization on the received radar echo vector by using the construction of the OWJD vector and all coherence information available, i.e., the processing based on the model of the OWJD vector can not only adaptively coregister...
An optimal design approach which combines the real frequency method and the direct numerical optimization is used to design a broadband matching network for an electrically small antenna. According to the characteristic of electrically small antenna, a network topology which improves the electrically small antennapsilas efficiency observably is designed with two methods respectively, and the design...
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