bidirectional antenna

bidirectional antenna

[‚bī·də′rek·shən·əl an′ten·ə]
(electromagnetism)
An antenna that radiates or receives most of its energy in only two directions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In this paper, a bidirectional antenna installed inside a vehicle was proposed and the experimental results of a power link between two vehicles described.
Caption: Figure 1: Structure of the proposed bidirectional antenna: (a) single radiation patch; (b) two patches; (c) three patches.
Caption: Figure 4: Simulated and measured H-plane radiation patterns of the bidirectional antennas at 5.8 GHz: (a) single radiation patch; (b) two patches; (c) three patches.
The winning products were Comba Telecom's CriticalPointPublic Safety Bidirectional Antenna, DragonWave's Harmony Enhanced MC, GEAR4's D3O Piccadilly Case, Jabra's Elite Sport Wireless Earbuds, Leef's iBridge 3, Sabre Industries' SmartStack small cell pole, and weBoost's Drive 4G-X signal booster.
Section 3 shows the proposed stacked bidirectional antenna structure based on the bidirectional Yagi antenna.
For comparing the performance of the traditional Yagi-Uda and the proposed bidirectional antenna, we build an optimum Yagi-Uda antenna with four directors and a bidirectional Yagi antenna with eight directors.
As shown in Figure 3(a), the bidirectional antenna has a frequency offset around 30 MHz (3.3%) from the original Yagi antenna.
Based on the bidirectional Yagi antenna mentioned in the last section, we propose a stacked bidirectional antenna in this section.
Thus the solution is to replace the omnidirectional dipole with a bidirectional antenna. In other words, it is to combine two bidirectional linearly polarized antennas orthogonally at a distance of [[lambda].sub.0]/4.
The size of the microcell zones can be efficiently increased by using bidirectional antennas, which preferentially radiate the antenna beam along the longitude [1, 2].
In these environments, for example, streets, highways, tunnels, and corridors, a unidirectional or bidirectional antenna performs better than an omnidirectional antenna [5-11].
Phongcharoenpanich, and T Wakabayashi, "A simple and cost-effective bidirectional antenna using a probe excited circular ring," IEICE Transactions on Electronics, vol.