Microstrip antennas have been one of the most innovative topics in antenna theory and design in recent years, and are increasingly finding application in a wide range of modern microwave systems. This paper begins with a brief overview of the basic characteristics of microstrip antennas, and then concentrates on the most significant developments in microstrip antenna technology that have been made in the last several years. Emphasis is on new antenna configurations for improved electrical performance and manufacturability and on advances in the analytical modeling of microstrip antennas and arrays. >

Microstrip antennas

Look to this new, cutting-edge microstrip antenna book for the first exhaustive coverage of broadband techniques, including the most up-to-date information to help you choose and design the optimum broadband microstrip antenna configurations for your applications, without sacrificing other antenna parameters. The book shows you how to take advantage of the lightweight, low volume benefits of these antennas, by providing clear explanations of the various configurations and simple design equations that help you analyze and design microstrip antennas with speed and confidence. This practical resource offers you a comprehensive understanding of the radiation mechanism and characteristic of microstrip antennas, and provides guidance in designing new types of planar monopole antennas with multi-octave bandwidth. You learn how to select and design proper broadband microstrip antenna configurations for compact, tunable, dual-band and circular polarization applications. Moreover, the book compares all the broadband techniques and suggests the most attractive configuration. Extensively referenced with over 300 illustrations and 140 equations.

Broadband Microstrip Antennas

Dual-frequency patch antennas may provide an alternative to large-bandwidth planar antennas, in applications in which large bandwidth is really needed for operating at two separate transmit-receive bands. When the two operating frequencies are far apart, a dual-frequency patch structure can be conceived to avoid the use of separate antennas. In this paper, a critical overview of possible solutions for dual-frequency patch antennas is presented, and future perspectives are outlined. Geometries are discussed in particular.

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Dual-frequency patch antennas

This paper describes the design and testing of an aperture-coupled circularly polarized antenna for Global Positioning System (GPS) applications. The antenna operates at both the L1 and L2 frequencies of 1575 and 1227 MHz, which is required for differential GPS systems in order to provide maximum positioning accuracy. Electrical performance, low-profile, and cost were equally important requirements for this antenna. The design procedure is discussed, and measured results are presented. Results from a manufacturing sensitivity analysis are also included.

A dual-band circularly polarized aperture-coupled stacked microstrip antenna for global positioning satellite

K-band aperture-coupled stacked microstrip antennas are studied and numerical results based on the solution of integral equations solved in the spectral domain are presented. The effects of varying physical parameters of the structure are investigated with the goal of designing millimeter-wave wideband microstrip antennas. Antennas with different characteristics are then analyzed and compared with experimental data. Bandwidths in excess of 20% are obtained and applications to phased array antennas are discussed. >

Millimeter-wave design of wide-band aperture-coupled stacked microstrip antennas

A multifunctional aperture coupled stacked patch antenna is presented that operates at dual frequency bands. At the lower frequency band, the antenna exhibits a 2:1 VSWR bandwidth of 20%, and at the higher frequency band, it behaves like a conventional narrowband patch antenna with a 2:1 VSWR bandwidth of 3%. Measured VSWR and far-field radiation patterns as well as numerical predictions are presented. A proper choice of the patch dimensions has been found critical to achieve this multifunctional performance.

Multifunctional aperture coupled stack patch antenna

A multifunctional aperture coupled stacked patch antenna that operates at dual-frequency bands is presented. At the lower frequency band, the antenna exhibits a 2:1 voltage standing wave ratio (VSWR) bandwidth of 20%. At the higher frequency band it behaves like a conventional narrowband patch antenna with a 2:1 VSWR bandwidth of 3%. Measured VSWR and far-field radiation patterns as well as numerical predictions are presented. A proper choice of the patch dimensions has been found critical to achieve this multifunctional performance. >

Multifunctional aperture coupled stacked antenna

A full-wave spectral domain model of a series-fed, traveling-wave aperture-coupled patch array antenna is presented. This configuration allows for performance optimization by adjustment of the aperture size, aperture location, and patch size. The theory successfully predicts the input impedance and far-field patterns of various C-band configurations.

Analysis of a series-fed aperture-coupled patch array antenna

The authors present a novel design for a low-sidelobe microstrip antenna array and feed network at C-band (6 GHz). The array consists of 10 rectangular patch elements. A -30-dB sidelobe Chebyshev weighting function was used to produce a tapered aperture illumination. The implementation of the tapered weighting function was carried out by using branch-line couplers in the corporate feed. Experimental results show that a -25-dB sidelobe level was achieved in this design with an absolute gain of 18.2 dB, an efficiency of 80% and a cross polarization of -16 dB. >

J. Wang

Papers

Multifunctional aperture coupled stack patch antenna

Multifunctional aperture coupled stacked antenna

Analysis of a series-fed aperture-coupled patch array antenna

Design study of a low sidelobe microstrip antenna array and feed network

Association between blood flow pattern and rupture risk of abdominal aortic aneurysm based on computational fluid dynamics.