Results 21 to 30 of about 132 (115)
Active Retrodirective Array for Microwave Power Transmission
, 1979 International Telemetering Conference Proceedings / November 19-21, 1979 / Town and Country Hotel, San Diego, CaliforniaAn active retrodirective array (ARA) is a phased antenna array in which retrodirectivity of the transmitted beam is produced by ...
Chernoff, Ralph C.
core +5 more sources
A retrodirective microstrip antenna array [PDF]
IEEE Transactions on Antennas and Propagation, 1998 A Van Atta retrodirective reflector was designed and developed, using an aperture-coupled microstrip antenna array. This reflector possesses the advantage of reflecting high fields to the source point over a wide range of incidence angles and, owing to the low cost and conformability of the structure, is suitable for applications in intelligent vehicle
null Shyh-Jong Chung, null Kai Chang
openaire +1 more source
Beam Pattern Optimization Method for Subarray‐Based Hybrid Beamforming Systems
Wireless Communications and Mobile Computing, Volume 2020, Issue 1, 2020., 2020 Massive multiple‐input multiple‐output (MIMO) systems operating at millimeter‐wave (mmWave) frequencies promise to satisfy the demand for higher data rates in mobile communication networks. A practical challenge that arises is the calibration in amplitude and phase of these massive MIMO systems, as the antenna elements are too densely packed to provide
Joerg Eisenbeis +7 more
wiley +1 more source
Robust Synthesis Algorithm for Directional Modulation Signal with Array Manifold Vectors Uncertainty
International Journal of Antennas and Propagation, Volume 2020, Issue 1, 2020., 2020 Directional modulation (DM) has become a new research hotspot of physical layer security (PLS) communication at the transmitter side. In this paper, we propose a robust synthesis algorithm for DM signal under the condition of the array manifold vectors perturbation.
Tao Hong, Ana Alejos
wiley +1 more source
Wireless Communications and Mobile Computing, Volume 2020, Issue 1, 2020., 2020 Millimeter‐wave (mmWave) networks with the frequency spectrum ranging from 30 GHz (with wavelength 10 mm) to 300 GHz (with wavelength 1 mm), can support massive wireless data in fifth‐generation (5G) systems. Importantly, large colocated antenna elements can be exploited at the base station (BS) to facilitate beam‐steering synthesis along the users ...
Shaddrack Yaw Nusenu +2 more
wiley +1 more source
Multiangle retrodirective cascaded metasurface [PDF]
Journal of Applied Physics, 2019 In this paper, a cascaded retrodirective metasurface is designed and demonstrated to operate simultaneously at a wide range of incident angles from −30° to −10° and 10° to 30°. It is based on the design of several retrodirective super-cells following the generalized Snell’s law of reflection, where each super-cell is designed to redirect an incoming ...
Kalaagi, Mohammed, Seetharamdoo, Divitha
openaire +1 more source
Design and Simulation of a Broad Band Retrodirective Array Element
, 2011 In this paper, a novel dual-polarized antenna fed by microstrip line for retrodirective array is presented. The star-shaped patch is used to reduce the mutual coupling among array elements; also bandwidth can be enhanced by choosing stacked patch.
Li Ye Fang, Jian Hua Zhang, Feng Ge Hu
core +1 more source
Retrodirective Antenna for Inter-Satellite Data Transmission [PDF]
IEEE Access, 2020 A new X-band retrodirective antenna based on superheterodyne mixer and phase conjugating technology is proposed for inter-satellite data transmission in this paper. The novel phase conjugating circuit, utilizing the reciprocity of the passive mixers, achieves high RF-IF and LO-IF isolations, high communication link gain, and a very compact low profile ...
Xiaoli Wei, Lianxing He, Lei Chen
openaire +3 more sources
The practical implementation of a retrodirective cross-eye jammer by using software defined radio (SDR) [PDF]
, 2022 Dissertation (MEng (Electronic Engineering))--University of Pretoria, 2022.Radar-guided missiles have the potential to cause extreme damage to vital military assets. Although traditional deception techniques can deceive radars in range and Doppler shift,
core +1 more source
Developments in retrodirective array technology
IET Microwaves, Antennas & Propagation, 2013 There has been significant interest in retrodirective antennas, especially considering the wealth of applications that could be significantly enhanced, or created, by the use of such technology. There is enormous potential for retrodirective antennas where complicated automatic tracking systems would benefit from being replaced by much simpler systems.
Fusco, Vincent, Buchanan, Neil
openaire +2 more sources