Results 291 to 300 of about 3,502 (339)

Stepped leaky-wave antennas for microwave and millimeter wave applications

Annales Des Télécommunications, 1997
This work presents the complete general features of a recently proposed class of leaky-wave antennas, derived from stepped rectangular-section waveguides with radiating slits. Based on very favorable topological features, straightforward but extremely effective design procedures are shown to be possible for achieving sophisticated radiation properties.
DI NALLO C., FREZZA, Fabrizio, GALLI, Alessandro, GEROSA, Giorgio, LAMPARIELLO, Paolo   +4 more
openaire   +3 more sources

Dual-Band Fixed-Frequency Beam-Scanning Leaky-Wave Antenna for Large-Frequency-Ratio Microwave and Millimeter-Wave Applications

IEEE Transactions on Antennas and Propagation, 2022
A dual-band fixed-frequency beam-scanning leaky-wave antenna (LWA) operating in C and Ka bands is presented in this article, exhibiting a large-frequency-ratio property.
Shanzhe Wang, Zheng Li, Meie Chen, Junhong Wang   +3 more
semanticscholar   +1 more source

Reconfigurable leaky-wave antennas

2018
In this chapter, an overview of the recent development of reconfigurable high-gain antennas is presented. These antennas range from reconfigurable Yagi antennas, reconfigurable reflectarrays and reconfigurable transmitarrays to reconfigurable PRS antennas.
Yingjie Jay Guo, Debabrata K. Karmokar, Trevor S. Bird   +2 more
openaire   +1 more source

Circularly Polarized Slotted Waveguide Leaky Wave Antenna at W Band for Radar Application

International Symposium on Antennas and Propagation, 2022
This article presents a circularly polarized leaky wave antenna at W band for radar and imaging applications. For achieving circular polarization, a dielectric layer with array of patches is introduced above rectangular slotted waveguide antenna.
Shilpi Singh, A. Basu
semanticscholar   +1 more source

A leaky-wave groove antenna at optical frequency

Journal of Applied Physics, 2012
In the framework of nanoantennas functioning at optical frequencies, we present here a new kind of leaky-wave antenna realized as a groove in an aluminum superstrate, supported by a silver substrate. The antenna works in the optical frequency range where the silver acts as a dielectric with equivalent refractive index between zero and one.
Polemi A., Maci S.
openaire   +3 more sources

Amplitude-Modulated Leaky-Wave Antennas

IEEE Transactions on Antennas and Propagation, 2021
Borrowing the idea of amplitude modulation from classical communications theory, this article proposes and demonstrates a new concept of amplitude-modulated (AM) leaky-wave antennas. In the proposed concept, the traveling wave in a wave-guiding structure serves as the carrier wave whose amplitude is spatially modulated by a predefined modulating ...
Geng-Bo Wu, Qing-Le Zhang, Ka Fai Chan, Bao-Jie Chen, Chi Hou Chan   +4 more
openaire   +1 more source

A Periodic CPW Leaky-Wave Antenna With Enhanced Gain and Broadside Radiation

IEEE Antennas and Wireless Propagation Letters, 2022
In this letter, a periodic coplanar waveguide leaky-wave antenna with enhanced gain and continuous backward-to-forward beam scanning is presented. The leaky-wave antenna is made of coplanar waveguide with two symmetric transversal slots on the ground ...
Henghui Wang, Sheng Sun, Xiaohan Xue
semanticscholar   +1 more source

Single-Conductor Strip Leaky-Wave Antenna

IEEE Transactions on Antennas and Propagation, 2003
The radiation characteristics of a single-conductor strip leaky-wave antenna is investigated. This structure has only a single-conductor strip on a substrate without a background plane. The broadband characteristics of the first higher order space-wave mode render this structure a broadband antenna. These result in a very wide leaky region.
null Wanchu Hong, null Yu-De Lin
openaire   +1 more source

Review of Recent Advances in the Leaky-Wave Analysis of 2-D Leaky-Wave Antennas

2020 14th European Conference on Antennas and Propagation (EuCAP), 2020
Recent developments are reviewed in the area of leaky-wave analysis of two-dimensional (2-D) leaky-wave antennas. Recent results are reviewed in three areas: (1) new beamwidth formulas for 2-D leaky-wave antennas, (2) leakywave analysis of wideband Fabry-Perot cavity antennas, and (3) leaky-wave analysis of 2-D periodic leaky-wave antennas (those that ...
Jackson D. R., Capolino F., Almutawa A., Kazemi H., Sengupta S., Fuscaldo W., Galli A., Long S. A.   +7 more
openaire   +2 more sources

Graphene terahertz leaky-wave antennas

2019
In this chapter, we focus on the recent developments made in the context of graphene THz antennas, especially those exploiting the graphene field effect to reconfigure their radiating features. To this purpose, we first review the electronic properties of graphene in the THz range from both a physical and an engineering perspective.
Fuscaldo W, Burghignoli P, Baccarelli P, Galli -A   +3 more
openaire   +1 more source