Topic
Reflective array antenna
About: Reflective array antenna is a research topic. Over the lifetime, 4366 publications have been published within this topic receiving 57884 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: It is shown that the use of Fermatn's spiral as a template for the antenna array leads to similar results in terms of sidelobe level and bandwidth as those obtained by computationally expensive non-linear optimization methods.
Abstract: We propose an aperiodic antenna array to suppress secondary radiation lobes in widely spaced arrays. We show that the use of Fermatn’s spiral as a template for the antenna array leads to similar results in terms of sidelobe level and bandwidth as those obtained by computationally expensive non-linear optimization methods. Furthermore, by maintaining the distances between neighbors approximately constant, the increase in array footprint is kept approximately within 25% of an equivalent periodic array, a key feature for space-constrained applications. Based on the straightforward computation of our method, we are able to present the results for arrays varying from 4 to 2048 elements and minimal spacing between the antennas up to ten wavelengths.
37 citations
Patent•
15 Mar 2001
TL;DR: In this article, a layered, electronically scanned antenna includes a plurality or array layers separated by dielectric spacers, each array layer includes a transistor switched grid formed by a plurality of reflective/transmissive elements such as cross dipoles interconnected by a plethora of semiconductors, such as MOSFETs.
Abstract: A layered, electronically scanned antenna. The antenna includes a plurality or array layers separated by dielectric spacers. Each array layer includes a transistor switched grid formed by a plurality of reflective/transmissive elements such as cross dipoles interconnected by a plurality of semiconductors, such as MOSFETs. When the switched grid is in an open state, its associated array layer is reflective. When it is in a closed condition, its associated layer is in a transmissive state. By controlling the state of each array layer, a desired degree of phase shift can be imparted to the signal reflected by the antenna. The antenna thus eliminates the need for costly MEMS/MMIC technology to achieve the desired degrees of phase shift of a signal reflected by the antenna.
36 citations
TL;DR: In this paper, the radiation characteristics of a uniform circular array with linear centrally-fed dipole elements, used for smart antenna systems, were analyzed based on the thin-wire model.
Abstract: The radiation characteristics of a uniform circular array with linear centrally-fed dipole elements, used for smart antenna systems, are analyzed in this paper. The radiation patterns of the array and the gain of the array over a single element are derived based on the thin-wire model. Numerical simulations using the thin-wire model and the method of moments (MoM) have been conducted and compared for a half-wavelength dipole array. Simulations using the MoM demonstrate that the wire diameter of the elements has no significant effect on normalized azimuthal and elevation patterns for a given pattern design. Normalized azimuthal patterns by the thin-wire model and the MoM are in good agreement with each other, while normalized elevation patterns by the thin-wire model are inaccurate since mutual coupling is not considered in the model. Wire diameter affects the radiation resistance and thus determines the amplitude of the radiation field.
36 citations
Patent•
15 Aug 2003
TL;DR: In this paper, various techniques for improving isolation between dielectric antennas mounted on a small substrate, for example a PCB in a mobile communications device or WLAN access point or the like, are disclosed.
Abstract: There are disclosed various techniques for improving isolation between dielectric antennas mounted on a small substrate, for example a PCB in a mobile communications device or WLAN access point or the like. The techniques include arranging the antennas in various orthogonal configurations so that nulls in their radiation patterns coincide and optionally making use of polarisation diversity. Further techniques include the provision of conductive barriers between the antennas and feeding one antenna with part of a signal from another antenna in anti-phase. The present invention allows a number of antennas to be provided in a small area so as to provide good operational diversity.
36 citations
Patent•
3 Sep 1992TL;DR: In this article, a multi-layer array antenna with high frequency band microstrip antennas formed on a surface of a first dielectric substrate, and a comb-shaped low frequency band antenna with microstrip antenna formed on the surface of the second dielectoric substrate, which is disposed on the first substrate, was used for supplying microwave power to the antenna through the first and the second substrate.
Abstract: A multi-layer array antenna having high frequency band microstrip antennas formed on a surface of a first dielectric substrate, comb-shaped low frequency band microstrip antennas formed on a surface of a second dielectric substrate which is disposed on the first dielectric substrate, and through-holes for supplying microwave power to the comb-shaped low frequency band microstrip antennas through the first and the second dielectric substrates.
36 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 10 |
| 2024 | 24 |
| 2023 | 13 |
| 2022 | 23 |
| 2021 | 1 |
| 2020 | 9 |