Results 151 to 160 of about 1,112,681 (393)

Impact of Directional Antennas on Ad Hoc Routing [PDF]

open access: bronze, 2003
Romit Roy Choudhury, Nitin H. Vaidya
openalex   +1 more source

BAT SHAPED CIRCULARLY POLARIZED ANTENNA FOR X AND KU BAND APPLICATIONS

open access: diamond, 2022
Sweta Singh   +3 more
openalex   +1 more source

Unidirectional Tape‐Based Composites from Hemp and Pineapple Leaf Fiber: Mechanical Performance in Conventional and Bio‐Based Matrices

open access: yesAdvanced Engineering Materials, EarlyView.
The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner   +22 more
wiley   +1 more source

Reconfigurable intelligent surface enabled programmable antenna chamber: Concept and preliminary experiments

open access: yesElectronics Letters
Antenna chambers are RF‐shielded enclosures which are required for antenna and radio performance measurements. Typically, anechoic chambers (ACs) are used for measuring directional metrics (e.g.
Yifa Li   +5 more
doaj   +1 more source

A Wide-Angle and PON Fully Polarimetric Retrodirective Array at the X Band

open access: yesMicromachines
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 ...
Shuangdi Zhao   +3 more
doaj   +1 more source

A new analysis of beam-waveguide antennas considering the presence of the enclosure [PDF]

open access: yes
Beam-waveguide (BWG) antennas provide multiple frequency band operations and other operational benefits for large ground-station antennas. Present design practices use diffraction analyses that ignore the presence of the BWG enclosure and may be ...
Cha, A. G.
core   +1 more source

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