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Patent

Flexible antenna with capacative plate coupling

TLDR
A whip antenna as mentioned in this paper is constructed in three sections which screw together end-to-end to form the complete antenna, each section comprises a flexible fiberglass rod which is surrounded by a sleeve of braided copper wire over a major part of its length, this sleeve serving to pass radio frequency current along the section during use of the antenna.
Abstract
A whip antenna is constructed in three sections which screw together end-to-end to form the complete antenna. Each section comprises a flexible fiberglass rod which is surrounded by a sleeve of braided copper wire over a major part of its length, this sleeve serving to pass radio frequency current along the section during use of the antenna. Two of the sections also each provide a capacitor which is connected in the radio frequency path along the antenna. Each of these capacitors is formed by two strips of copper tape which constitute the capacitor electrodes and which lie opposing one another on the surface of the fiberglass rod of the appropriate section.

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Citations
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Patent

Whip antenna high voltage protection device

TL;DR: In this paper, a high voltage protection device for protecting personnel from injury or th as well as damage to radios and vehicles when a whip antenna comes in contact with overhead high voltage power lines or the like is described.
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Nonsquinting end-fed quadrifilar helical antenna

TL;DR: In this article, each conductor of the antenna is fed with a successively delayed phase representation of the input signal to optimize transmission characteristics, and each of the conductors is separated into a number Z of discrete conductor portions by Z-1 capacitive discontinuities.
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Handheld System for Radar Detection

TL;DR: In this article, the authors presented a radar platform that detects intruders and wirelessly reports to a key-fob, which consists of a MicroPower Radar (MPR), a data acquisition (DAQ) element and a processor.
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Isolated antenna assembly

TL;DR: In this article, an isolator assembly for isolating a transmitting and receiving communications antenna member from a mast and connector is presented, which electrically couples an antenna member to a connector for passage of radio frequency energy.
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Rotor modulation suppressor

TL;DR: In this paper, the rotor blades of a helicopter are electrically connected by reactive elements selected to alter the self-resonant frequency of the rotor blade and reduce the antenna Q to a noninterfering frequency range.
References
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Patent

Unloaded helical antenna

Patent

Tunable whip antenna