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The Steering Committee for 2011 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting welcomes you to Spokane, Washington for what we believe will be both a productive and pleasurable event. The technical program will cover a vast array of electromagnetic topics, including the latest breakthroughs in antenna design, wireless communications, exotic materials,...
We present results for frequency-domain MoM simulations of electrically large structures using out-of-core solver accelerated with multiple GPUs on a single personal computer. The structures analyzed in order to demonstrate the efficiency of proposed out-of-core solver are Cassegrain reflector antenna with up to 240 λ reflector diameter and Luneburg lens, up to 16 λ diameter, excited with a half-wavelength...
In this paper, a new type of double-slot end-wall waveguide-to-CPW transition is analyzed. The configuration is modified from a previously designed waveguide-to-microstrip splitter transition. A transmission line model is presented to explain the performance. The simulation results of 90 to 140 GHz transition including the E-field distribution confirm the analysis.
This paper presents a microstrip diplexer operating at 9.79 and 11.47 GHz. The proposed diplexer consists of two parallel coupled line band-pass filters (BPFs) designed using a randomly defined image impedance technique. Thus, suitable coupled line gap distance can be obtained for conventional wet-etching fabrication. This allows easy design and fabrication of the parallel coupled line type BPFs and...
A generic, simple, and fast method using transmission line (T.L.) circuit model that can be used to design and characterize the substrate integrated waveguide (SIW) power splitters, is presented. The T.L. model is based on replacing all the components forming the actual SIW-power splitter structure by their multi-port networks. Two examples, 6 dB and 9 dB SIW-power splitter, are introduced to validate...
This paper presents for the first time, the development of a monolithic RF NEMS switch matrix. A prototype 3×3 monolithic switch matrix is designed and simulated at the nano-scale level using Ansoft HFSS and Agilent ADS. Simulation results show that the proposed NEMS switch matrices are capable of working up to 60GHz with good RF performance such as return loss of at least 20dB, isolation of at least...
Cavity-coupled designs for microstrip directional couplers are presented in this paper. Different coupling coefficients are pursued. All the designs feature a cavity in an electrically thick ground plane, which serves as a common ground for two back-to-back microstrip lines. These cavity-coupled designs can offer more bandwidth compared to their corresponding slot-coupled designs. Finite element method...
This paper presents two designs for microstrip power dividers using a cavity coupler. Both designs feature a cavity in an electrically thick ground plane between two parallel back-to-back microstrip lines with the input line terminated by an open-circuited stub. The cavity-coupled designs can provide more bandwidth compared to their corresponding slot-coupled designs. Finite element method is chosen...
This paper presents a pseudo-elliptic substrate integrated cross-coupled filter with two finite transmission zeros based on quasi-ridged resonators. The filter was designed and simulated at central frequency of about 5.8 GHz. It has a bandwidth of 400 MHz and exhibits good stopband rejection of 25 dB.
A tri-band Wilkinson power divider is presented in this paper. The quarter-wavelength transformer in a conventional Wilkinson power divider is substituted by a pair of two-section transmission line and a coupled line in between. The design procedure for tri-band operation can be obtained by even-and odd- modes analysis. A tri-band Wilkinson power divider was designed and implemented on an FR4 printed...
In this paper, a design of miniaturized 3-way Bagley polygon power divider (BPD) is presented. The design is based on using non-uniform transmission lines (NTLs) in each arm of the divider instead of the conventional uniform ones. For verification purposes, a 3-way BPD is designed, simulated, fabricated, and measured. Besides suppressing the fundamental frequency's odd harmonics, a size reduction...
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