dielectric lens
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dielectric lens
n
(General Physics) physics a lens constructed of a material that converges or diverges a beam of electromagnetic radiation of radio frequency
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References in periodicals archive
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The proposed structure is composed by 2 x 2 array of slot-ring antennas covered by a hemispherical dielectric lens.
Metamaterials used for the dielectric lens reduce its weight by about 90
In these early stages metallic lens antennas such as metal-lens antennas and wire-grid lens antennas [1], reflector lens antennas [2], spherical antennas [3], dual lens antennas [4], as well as dielectric lens antennas [5], and substrate lens antennas [6] were successfully investigated.
To compensate this issue, a wideband dielectric lens is placed in the aperture of each element.
The capabilities of a Ka-band prolate ellipsoidal shaped dielectric lens antenna for generating asymmetric beams producing circular ground footprints have been investigated.
In the latest case, the dielectric lens can be placed in front of the horn [6] or inserted in the horn aperture [7, 8].
i] is the wave vector of the incident wave and n is the refractive index of the lens material which is normally a constant and is greater than unity for natural dielectric lens.
The research used an in vitro exposure system developed by NTT DoCoMo that incorporated a horn antenna and dielectric lens in an anechoic chamber.
It consisted of a feed antenna and a dielectric lens that focuses microwave energy onto the sample.
To overcome the problem, according to [10-13] dielectric lens loading is introduced in this paper to reduce the phase error at the aperture, which helps improve antennas' radiation patterns in the high frequency band and increase radiation gain in the whole frequency band; meanwhile, a novel ridge structure with slot loading on ridges is adopted in this paper and the simulated and measured results show that the impedance matching characteristic of the antenna in the lower frequency band is improved greatly due to the addition of the slot loading.
Rebeiz, "Off-axis properties of silicon and quartz dielectric lens antennas," IEEE Trans.
Maruyama firstly applied Pareto-GA algorithm to balance gain against SLL of the shaped dielectric lens antenna on three principal cut planes [25].
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