Results 271 to 280 of about 11,483 (315)
Some of the next articles are maybe not open access.
Planar reconfigurable antennas
2006 First European Conference on Antennas and Propagation, 2006In this paper it is shown that planar reconfigurable antennas can cover a wide range of designs such as fractal antennas, triangular antennas, monopole, dipoles, log-periodic etc. Some of these designs can also be used to yield tunable electrically small antennas for miniature wireless device applications.
Christos G. Christodoulou +3 more
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
A Planar, Differential, and Directive Ultrawideband Antenna
IEEE Transactions on Antennas and Propagation, 2010A novel planar differential ultrawideband antenna is described and both numerically and experimentally characterized. The proposed antenna is formed by two disc monopoles fed by 50-Ohm microstrip lines with a structured ground plane. Simulations and measurements demonstrate that it is possible to achieve a huge increase in directionality with respect ...
LOCATELLI, Andrea +6 more
openaire +4 more sources
Design and optimization of a planar UWB antenna
East-West Design & Test Symposium (EWDTS 2013), 2013In this paper, we present our design on a simple, low-profile wideband planar antenna with a pure circular radiator fed by a 50Ω microstrip line. By investigating the feeding position and ground plane dimensions, the antenna is optimized to have a very wide bandwidth that covers the whole FCC-allocated ultra-wideband (UWB) spectrum.
Eng Gee Lim +9 more
openaire +1 more source
Ultrawideband planar antennas and antenna arrays
2012 6th International Conference on Ultrawideband and Ultrashort Impulse Signals, 2012The paper presents analysis of signals and planar monopole pulse antennas and antenna arrays designed for work in ultrawideband (UWB) frequency band 3.1–10.6GHz. A complex approach to design, synthesis and optimization of UWB antennas is proposed. Frequency and time characteristics of UWB signals, designed single and two-element antennas, results of ...
openaire +1 more source
2016
Many applications of RF systems impose severe space constraints on the design of the antenna. Military aircraft, satellites, guided missiles, and mobile broadband systems (to name but a few) need low-profile antennas that effortlessly integrate into a mechanical structure.
Jaco du Preez, Saurabh Sinha
openaire +1 more source
Many applications of RF systems impose severe space constraints on the design of the antenna. Military aircraft, satellites, guided missiles, and mobile broadband systems (to name but a few) need low-profile antennas that effortlessly integrate into a mechanical structure.
Jaco du Preez, Saurabh Sinha
openaire +1 more source
Investigation on L‐shaped planar antennas
Radio Science, 2004An L‐shaped planar antenna is investigated numerically and validated experimentally. The effect of varying the ratio of the height of vertical segment to the length of horizontal segment is examined in relation to the impedance bandwidth, radiation pattern, and mode of operation.
Ammann, M. J., Chen, Zhi Ning
openaire +2 more sources
Planar antenna for LTE communication module
2014 IEEE 3rd Global Conference on Consumer Electronics (GCCE), 2014A planar antenna for the long term evolution (LTE) communication module is suggested and examined. A meander pattern is added to the planar antenna, and the return loss characteristic and the radiation patterns in the frequency band of 800MHz are improved. The high values of the absolute gains are obtained in the frequency bands, from 824MHz to 900MHz,
Hiromasa Miyazawa +8 more
openaire +1 more source