Results 61 to 70 of about 1,317 (206)
Dual-circularly polarized reflectarrays as standardized antenna solutions for CubeSats [PDF]
, 2023 ESA Antenna Workshop on Large Deployable Antennas (41st. 2023. Th Netherlands)In this contribution, the design of wideband reflectarray antennas with dual linear polarization (LP) to dual circular polarization (CP) conversion is evaluated within complete
Martínez de Rioja, Daniel +5 more
core
IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.This paper presents a frequency‐reconfigurable dual‐band nematic liquid‐crystal (LC) reflectarray antenna with angular beam separation for satellite communication. Dual‐band operation at 12 and 28 GHz is achieved through voltage‐controlled reconfiguration of the LC layer.
Hsi‐Hsir Chou +3 more
wiley +1 more source
Water-Based Microwave Reflectarrays
, 2020 Control of transmission/reflection of waves continues to be a task of great importance. Especially, 2-D structures such as metasurfaces, with imprinted spatial phase variation coming from arrays of small metallic/dielectric scatterers, are of increasing ...
Nielsen, Jonas Ørnskov +3 more
core
Bandwidth Behavior of Closely Spaced Aperture-Coupled Reflectarrays
International Journal of Antennas and Propagation, 2012 The bandwidth features of reflectarray antennas are analyzed by examining in detail the phase errors due to the compensation mechanism for spatial phase delays.
F. Venneri, S. Costanzo, G. Di Massa
doaj +1 more source
IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.An efficient and broad‐band reflective microstrip polariser converter is proposed that converts linear polarization plane waves to circular polarization ones. It is experimentally shown that the designed device converts the LP plane‐waves to a CP one within 7.2∼12.6 GHz with 3‐dB AR bandwidth = 54.5%.
Mahdieh Bozorgi, Mahmood Rafaei‐Booket
wiley +1 more source
MEMS-Reconfigurable Metamaterials and Antenna Applications
International Journal of Antennas and Propagation, 2014 This paper reviews some of our contributions to reconfigurable metamaterials, where dynamic control is enabled by microelectromechanical systems (MEMS) technology.
Tomislav Debogovic +1 more
doaj +1 more source
IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.This paper presents a broadband 1‐bit reconfigurable transmitarray operating at 11.7 GHz, using interdigital structures to achieve a 23.1% 3‐dB transmission‐loss bandwidth without requiring an air gap. An EM‐acquired CRCS‐based link gain model is developed to evaluate the radiation gain, scattering characteristics and gain‐frequency response of the RTA.
Ting‐Hao Shih +2 more
wiley +1 more source
Electronics Letters, 2003 It is shown that the dominant factor controlling reflectarray bandwidth is the bandwidth of the radiating element, and that the effect of non-constant path delays over the surface of the flat reflector has little significance unless the aperture is electrically very large and the f/D ratio is small. An example of a polarisation-twist reflectarray using
openaire +1 more source
IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.This work presents a compact AMC‐backed logarithmic spiral antenna for CubeSat relay downlink communications, achieving wide impedance bandwidth from 5.1 to 16 GHz and stable circular polarization with a 48.64% axial‐ratio bandwidth. The integration of an artificial magnetic conductor enhances radiation efficiency and enables a measured peak gain of 9 ...
Talha Shahid Alvi +7 more
wiley +1 more source
Reconfigurable Optically Transparent Antenna Using Drop‐on‐Demand Printed Nematic Liquid Crystals
Advances in Materials Science and Engineering, Volume 2026, Issue 1, 2026.This paper reports on the design, fabrication methodology, and measurement of a microstrip patch antenna that is optically transparent and exhibits a reconfigurable frequency response using a nematic liquid crystal (LC) for 6G‐Internet‐of‐Things applications.
Bradley C. Mee +8 more
wiley +1 more source