Results 21 to 30 of about 300,396 (142)
A short‐time range‐angle‐decoupled beam pattern synthesis for frequency diverse arrays
IET Microwaves, Antennas &Propagation, Volume 15, Issue 8, Page 855-870, 1 July 2021., 2021 Abstract Frequency diverse array (FDA), by virtue of its range‐angle‐dependent beam pattern, has drawn a substantial attention in recent years. However, as far as the time‐variant range‐angle‐coupled beam pattern is concerned, such inherent flaw has become a bottleneck of its further development.
Can Cui +4 more
wiley +1 more source
Scatterers in the Rx Near Field for RF Energy Harvesting Efficiency Enhancement
Energies, 2022 In this paper, we investigate the enhancement of RF–RF energy harvesting efficiency (erf–rf) in multipath environments in the context of wireless power transfer (WPT).
Zahra Katbay +2 more
doaj +1 more source
International Journal of Antennas and Propagation, Volume 2021, Issue 1, 2021., 2021 This paper presents a compact, dual polarized bistatic (two closely spaced transmit and receive radiators) patch antenna with excellent interport isolation performance. The presented antenna system employs differential receive mode operation for the cancellation of self‐interference (SI) to achieve very high interport isolation for 2.4 GHz in‐band full
Haq Nawaz +4 more
wiley +1 more source
IEEE Access, 2020 An isolation technique, which does not require conventional circulators, is proposed for the realization of a simple and low-cost aperture-coupled circularly polarized antenna for application to full-duplex devices.
Paul Le Bihan +10 more
doaj +1 more source
Possibilities to use retrodirective antennas in radar systems [PDF]
Vojnotehni?ki glasnik, 2012 Possibilities to use retrodirective antennas in modern radar systems are presented in this paper. The basics of retrodirective theory, practical realizations of retrodirective arrays using corner reflectors, Van-Atta and heterodyne elements are considered.
Aleksandar M. Pavić, Veljko Z. Nikolić
openaire +2 more sources
, 1995 International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, NevadaTwo retrodirective antenna systems that autonomously point high gain beams to a signal source without requiring a priori knowledge of ...
Kaiser, Julius A.
core +5 more sources
Demonstration of Digital Retrodirective Method for Solar Power Satellite
, 2021 This work presents digital retrodirective method to do microwave power transfer (MPT) for solar power satellite (SPS). Due to space environment, there is concern of antenna deformation, which will affect beam forming.
Mudassir Raza, Koji Tanaka
core +1 more source
IEEE Access, 2020 This work presents novel techniques to realize a retrodirective millimeter wave antenna array with wide field of view. High gain arrays in phase conjugate configuration are used in combination with orthogonal polarization states and a novel pulse ...
Ahmed Bilal Numan +2 more
doaj +1 more source
Reconfigurable wideband patch antenna for cognitive radio [PDF]
, 2009 Cognitive radio communication is envisaged to be a new paradigm of methodologies for enhancing the performance of radio communication systems through the efficient utilization of radio spectrum.
AbuTarboush, HF +14 more
core +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