Results 251 to 260 of about 51,071 (307)
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The planar lateral wave antenna
Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation, 2012A novel planar lateral wave antenna concept that promises impedance matching over factor a one to three bandwidth, very high efficiency, and high directivity in one plane in presented. The structure realizes a planar elliptical dielectric lens antenna for focusing the beams in the H-plane.
Türker Tokan, Nurhan +2 more
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International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's, 1990
The architecture of a new type of L-band multiple-beam antenna (ALE 3*5) for air traffic control (ATC) is presented. The electrical performance makes it equivalent to an antenna with very sharp horizon cutoff, large coverage angles, and high gain. The design requirements are as follows: frequency band of 1.25-1.35 GHz: a modular architecture with few ...
A. Cucci, A. Tomassoni, F. Madia
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The architecture of a new type of L-band multiple-beam antenna (ALE 3*5) for air traffic control (ATC) is presented. The electrical performance makes it equivalent to an antenna with very sharp horizon cutoff, large coverage angles, and high gain. The design requirements are as follows: frequency band of 1.25-1.35 GHz: a modular architecture with few ...
A. Cucci, A. Tomassoni, F. Madia
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The Planar Parabolic Optical Antenna
Nano Letters, 2012One of the simplest and most common structures used for directing light in macroscale applications is the parabolic reflector. Parabolic reflectors are ubiquitous in many technologies, from satellite dishes to hand-held flashlights. Today, there is a growing interest in the use of ultracompact metallic structures for manipulating light on the ...
David T, Schoen +4 more
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2008 China-Japan Joint Microwave Conference, 2008
Recent advancements of the super-wideband (SWB) planar antennas are reviewed, where the progress in SWB metal-plate monopole antennas, SWB printed monopole antennas and the SWB printed slot antennas is introduced and compared. In addition, a SWB printed antenna with the band-notched function is also presented.
Zhong Shun-shi +3 more
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Recent advancements of the super-wideband (SWB) planar antennas are reviewed, where the progress in SWB metal-plate monopole antennas, SWB printed monopole antennas and the SWB printed slot antennas is introduced and compared. In addition, a SWB printed antenna with the band-notched function is also presented.
Zhong Shun-shi +3 more
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Compact planar multiband antenna
2005 IEEE Antennas and Propagation Society International Symposium, 2005In this paper a compact multiband planar antenna for GPS (1575.4 MHz), DCS (1800 MHz), 2.4 GHz (2400-2485 MHz) and 5.8 GHz (5725-5825 MHz) WLAN is presented. The proposed antenna of dimensions 38 mm times 3 mm times 1.6 mm with three wide 2:1 VSWR bands around 1.8 GHz, 2.4 GHz and 5.8 GHz successfully covers the above bands with good radiation and ...
Joseph Manoj +3 more
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2005 Asia-Pacific Microwave Conference Proceedings, 2006
This paper presents a summary of two different types of planar UWB monopole antennas, i.e. electric and magnetic types. The electric monopole uses copper disc/ring as the radiating element; while elliptical/circular slot serves as the radiator for the magnetic monopole.
X. Chen +5 more
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This paper presents a summary of two different types of planar UWB monopole antennas, i.e. electric and magnetic types. The electric monopole uses copper disc/ring as the radiating element; while elliptical/circular slot serves as the radiator for the magnetic monopole.
X. Chen +5 more
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Directivity of planar antennas
IEEE Antennas and Propagation Magazine, 1999Starting with a common formula for directivity, given beamwidths, the author gives the modifications needed to improve the accuracy when the distribution is known. Also included is a nomograph that shows the parameters of the Taylor single-parameter distribution, and allows trade studies versus the sidelobe level.
V. Schejbal, J.D. Mahoney, N. McDonald
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Frontiers of Electrical and Electronic Engineering in China, 2008
Recent developments of the ultra-wideband (UWB) planar antennas are reviewed, where the progress in UWB plate monopole antennas, UWB printed monopole antennas and the UWB printed slot antennas is introduced and compared. In addition, the UWB printed antennas with the band-notched functions are also presented.
Shunshi Zhong +2 more
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Recent developments of the ultra-wideband (UWB) planar antennas are reviewed, where the progress in UWB plate monopole antennas, UWB printed monopole antennas and the UWB printed slot antennas is introduced and compared. In addition, the UWB printed antennas with the band-notched functions are also presented.
Shunshi Zhong +2 more
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2008 IEEE Antennas and Propagation Society International Symposium, 2008
A broadband planar antenna with stable radiation patterns is presented. It consists of a suspended radiator fed by a vertical feed through an n-shaped microstrip. The measured impedance bandwidth is 3.1-5.1 GHz for a return loss of |S11| < -10 dB, and an average gain of 7.7 dBi is achieved. There is no beam squinting across the operating frequency band.
null Wee Kian Toh +2 more
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A broadband planar antenna with stable radiation patterns is presented. It consists of a suspended radiator fed by a vertical feed through an n-shaped microstrip. The measured impedance bandwidth is 3.1-5.1 GHz for a return loss of |S11| < -10 dB, and an average gain of 7.7 dBi is achieved. There is no beam squinting across the operating frequency band.
null Wee Kian Toh +2 more
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2019 36th National Radio Science Conference (NRSC), 2019
In this paper, a plasma planar helical antenna (PPHA) is presented for achieving circularly polarized wideband antenna. The proposed antenna has advantages in compact size, easy fabrication, very simple, lightweight, low profile, and suitable to be mounted on space-constrained applications.
Shaymaa M. Gaber +2 more
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In this paper, a plasma planar helical antenna (PPHA) is presented for achieving circularly polarized wideband antenna. The proposed antenna has advantages in compact size, easy fabrication, very simple, lightweight, low profile, and suitable to be mounted on space-constrained applications.
Shaymaa M. Gaber +2 more
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