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This work presents the design, fabrication, and measurements of a compact, low loss, bandpass filter, using two asymmetrically loaded open circuited stubs on a microstrip square ring resonator. In the proposed design, a bandpass filter is developed from the stop band characteristics of the ring resonator. The operating frequency of the filter is at 2.4 GHz. The filter has a bandwidth of 1.4 GHz, resulting...
Novel microfluidic based focal plane arrays (FPAs) have been recently introduced as a low cost alternative to realize mm-wave beam-scanning arrays. These FPAs consist of a proximity-fed patch antenna within a microfluidic channel filled with a low loss dielectric solution. Elevation plane scanning is obtained by placing the channel at the focal plane of a microwave lens and repositioning the antenna...
This letter presents a circuit model of the antenna-in-package (AiP) employing the via holes to connect the antenna ground and the system ground. A closed-form expression for the inductance of ground via is provided in case that two ground vias are arranged under the non-radiating edge of the AiP. The new expression takes account of the radius and length of the vias, the relative positions of the...
In this paper, we present a novel, planar, circularly polarized (CP) Interweaved Spiral Array (ISPA) having a 10:1 bandwidth while operating conformally on a PEC ground plane. The design is based on Wheeler's concept and is comprised of rectangular, self-complementary spiral elements.
In this paper the parameters of the coupling between the feed and the slot and, between the slot and the antenna are determined and then used in the equivalent circuit to design the antenna. A good agreement is obtained between the predicted results based on the equivalent circuit and the results obtained from the software based electromagnetic simulation. Finally a single feed cross slot circular...
The design theory and the equivalent circuit model of an aperture-coupled vertically mounted strip antenna were presented. Related circuit element values were calculated with the help of the network analysis. Based on the developed equivalent circuit, a C-band ACVMSA was designed with the help of the hybrid GA optimization algorithm. The computed input impedance was compared to the simulation and...
In this paper, we show a wideband transmission line (TL) model for a Fabry-Perot cavity (FPC) antenna which is designed at a center frequency of 63 GHz using a thick and slotted metallic partially reflective surface. Then, by using the proposed wideband circuit model, we predict the gain and 3dB gain bandwidth of the antenna, assumed as infinitely large in the transverse domain (for the modeling purposes)...
This study has developed a two-layer printed circuit feed system that was analyzed with WIPL-D and has shown to achieve almost the same wideband character. As opposed to Friedman and Gouobau DLMs, the printed circuit feed system offers a low-cost alternative with similar performance.
In this paper, we study bandwidth management of a wireless/optical based access/metro network in support of voice and data services. For voice services, we use a finite state Markov Chain to estimate the blocking probability of voice circuits over an Adaptive modulation and coding wireless channel, as a function of the channel parameters. For data services, we evaluate a rate matching and a buffer...
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