In this paper, the authors propose a circularly polarized printed antenna combining a slot array antenna and a patch antenna, with dual-band operation. The proposed antenna has good isolation performance, is compact, and has simple configuration. This antenna is composed of two parts, a patch antenna (for Rx) on the top, and a slot array antenna (for Tx) on the bottom, respectively. The element...

A low cross-polarization slot array antenna in the narrow wall of ridge waveguide is presented. A non-angled slot which is created in the narrow wall of the ridge waveguide is considered to be used as radiating resonant slot. The normalized resistance and normalized reactance curves are presented for design purposes. A six element slot array waveguide antenna with ridges on its narrow wall is t...

-In this rapid changing world in wireless communication systems, multiband antenna has been playing a very important role for wireless service requirements. Rectangular line slot designs of a dual band patch antenna have been investigated in this paper. By using rectangular line slot patch geometry dual band operation has been obtained. The patch antenna is simulated by Ansoft HFSS and antenna ...

Pertinent theory for the design of longitudinal slot arrays is reviewed and its dependence on the dominant mode scattering off a single slot is pinpointed. The critical need to know resonant length versus slot offset is emphasized and the desirability of determining this information theoretically rather than experimentally is argued. Then method of moments solutions are used to calculate resona...

This paper presents the excitation of a longitudinal slot on a hollow rectangular coaxial line by a metal support between two conductors and the fabrication by diffusion bonding of laminated metal thin plates. The measured loss of a straight line is 0.046dB/cm at 60GHz while the simulated one is 0.043dB/cm.

Compact Circularly Polarized Slot-Ring Antenna and Microstrip Bandpass Filter Using Triangular Open-Loop Resonators. (December 2006) Muhammad Fahad Farooqui, B.E., NED University Chair of Advisory Committee: Dr. Kai Chang In this thesis two different research topics are undertaken, both in the area of compact RF/microwave circuits design. The first topic involves the design of a compact circula...

The Technique, to design multibeam Radial Line Slot Array (RLSA) antennas optimally, was proposed in this study, using high beam squint values produce more slots. This is necessary maintain gain, which dropped due the splitting. A gap also incorporated between slots group overcome a coupling adjacent beams can lessen gains. RLSA models for 42 dual and triple-beams were simulated after prototype...

Objective Parallel transmission is receiving more and more attention in MRI, and multi-element transmit MRI systems become commercially available. A number of different Tx/Rx antenna types have been presented for usage in parallel transmit configurations: degenerate birdcage coils, decoupled TEM or stripline coils [1,2,3]. All of these ‘traditional’ coil-types have their pro’s and con’s. We pro...