A spiral antenna with a tilted radiation pattern is disclosed. The disclosed antenna includes a dielectric substrate; a spiral radiation body which is formed on the upper part of the dielectric substrate; a ground surface which is formed in the lower part of the dielectric substrate; and a ...
This pattern has two equal radiation peaks, both broadside to the plane of the spiral antenna (which lies in the z=0 plane, or x-y plane). One peak is above the planar spiral antenna and the other is below. The Spiral Antenna has circular polarization over a wide beamwdith, often for...
small antenna; loop antenna; spiral ring; mobile communications; conventional method; method of moments Abstract A small antenna with a size of 1/15 to 1/5 wavelength, consisting of a toroidal coil of fixed length, is proposed. The radiation characteristics of antennas with a limited range ...
A spiral, helical antenna is configured to produce a generally circular polarized radiation pattern covering a range of frequencies, over a ground plane. The antenna is comprised of a spring-like spiral conductor that may be held in compression by a size and shape regulating outer nonconductive ...
the first time using the techniques for modeling an Archimedean spiral antenna element presented in the previous chapter. 3.1 Theory of WAVES Array Geometry The basic geometry of a WAVES array is shown in Fig. 3.1. The larger antenna Figure 3.1 Basic Geometry of WAVES Array. ...
A frequency-independent broad-band antenna, cut from sheet metal, that radiates a very broad, circularly polarized beam on both sides of its surface; this bidirectional radiation pattern is its chief limitation.McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The...
Spiral slotted phased antenna array 来自 掌桥科研 喜欢 0 阅读量: 23 作者: HJ Ellis 摘要: A flush mounting, cavity-backed, dual orthogonal slot antenna for aircraft and space vehicles is described. Improved radiation pattern characteristics are obtained by making the spiral slot pattern elliptical ...
A new planar, wideband feed for a slot spiral antenna is presented and tested at VHF frequencies. Radiation pattern measurements are presented to demonstra... Nurnberger,W M.,Volakis,... - 《Antennas & Propagation IEEE Transactions on》 被引量: 87发表: 1996年 加载更多来源...
20030006938Printed dipole antenna with dual spirals2003-01-09Nesic et al. 6466177Controlled radiation pattern array antenna using spiral slot array elements2002-10-15Kunysz343/769 6362796Broadband antenna2002-03-26Bohlman343/895 20010048399Dual-spiral-slot antenna for circular polarization2001-12-06Obersc...
The design characteristic-s of a compact size spiral type antenna, suitable for satellite mobile communications are determined. Criteria used in designing the antenna are low profile shape, circular polarization, optimum radiation pattern for European latitudes and simplicity in construction. Several ...