Results 1 to 10 of about 716,699 (142)

Maxwell Fisheye Lens Based Retrodirective Array. [PDF]

Sci Rep, 2019
AbstractA Maxwell fisheye lens using parallel plate index grading is presented in this study to develop a passive retrodirective antenna array. As a proof-of-concept a design frequency of 10 GHz was selected for fabrication and experiment. The design principals of the lens are discussed, which enables 85% energy flow at the drain probe (also referred ...
Abbasi MAB, Fusco VF.
europepmc   +8 more sources

SATCOM Retrodirective Array [PDF]

IEEE Transactions on Microwave Theory and Techniques, 2016
We present an in-depth look at the challenges involved in using analog retrodirective arrays for satellite communications (SATCOM). The main technical issues surrounding the development of a retrodirective (self-steering) SATCOM system are given and techniques for mitigating these issues are provided.
Vincent Fusco
exaly   +6 more sources

Reconfigurable metasurface array for diverse retrodirective reflections and radar cross section reduction. [PDF]

Nanophotonics
Retroreflectors can scatter the arbitrarily incident wave back to incoming direction, demonstrating great potential in wireless communication. However, there are limitations in adaptive retroreflection and polarization modulation with the existing ...
Wei WY, Shi Y, Meng ZK, Hui R, Wu QW.
europepmc   +3 more sources

Developments in retrodirective array technology

IET Microwaves, Antennas and 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.
Vincent Fusco, Neil Buchanan
exaly   +4 more sources

A Wide-Angle and PON Fully Polarimetric Retrodirective Array at the X Band. [PDF]

Micromachines (Basel)
A new type of fully polarimetric retrodirective array (RDA) using a PON-type structure is proposed in this paper. The fully polarimetric property is the result of the proposed phase conjugation circuits, which perform phase conjugation processing on the ...
Zhao S, Chen L, Pan J, Zhang T.
europepmc   +3 more sources

Directional modulation‐enhanced retrodirective array [PDF]

Electronics Letters, 2015
Unlike the mathematical techniques adopted in classical cryptographic technology at higher protocol layers, it is shown that characteristics intrinsic to the physical layer can be exploited to secure useful information. It is shown that a retrodirective array can be made to operate more securely by incorporating directional modulation (DM) concepts ...
Yuan Ding
exaly   +6 more sources

Simple Millimeter Wave Identification System Based on 60 GHz Van Atta Arrays. [PDF]

Sensors (Basel), 2022
The paper presents a proof-of-concept of a millimeter-wave identification system based on Van Atta array tags in the 60 GHz band. For interrogation of the tags, a vector network analyzer and a measurement transceiver were employed in alternative test ...
Trzebiatowski K, Rzymowski M, Kulas L, Nyka K.   +3 more
europepmc   +2 more sources

A 2-D Fully Polarized Van Atta Array Based on Wide-Beam Tri-Polarized Antennas. [PDF]

Micromachines (Basel)
This paper proposes a 2-D fully polarized Van Atta array, which consists of four tri-polarized antenna elements. The tri-polarized antenna element comprises a monopole antenna and a low-profile microstrip antenna that widens the beam by folding four ...
Pan J, Chen L, Zhao S, Zhang T.
europepmc   +2 more sources

Orientation Controllable RCS Enhancement Electromagnetic Surface to Improve the Road Barriers Detectability for Autonomous Driving Radar. [PDF]

Sensors (Basel)
An orientation controllable radar cross section (RCS) enhancement surface is presented in this paper, which can be used to improve the road pile detectability of on-board microwave radar for autonomous driving system.
Chen Y, Wang T, Liu Q, Wang H, Jin C.
europepmc   +2 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
Shyh-Jong Chung
exaly   +2 more sources