slot spiral antenna to explain its broad-band characteristics. The total electrical e–ciency and peak realized gain of this slot were compared with those of a rectangular slot which is the current slot shape used in SWASS. The gain patterns from an optimised spiral shape slot were simulated and conflrmed by measurement. 2. Travelling Wave, Broadband, and Frequency Independent … Travelling Wave, Broadband, and Frequency Independent Antennas An example of this traveling wave antenna is called the The geometry of the spiral antenna can be described by ... Travelling Wave, Broadband, and Frequency ... US9337533B2 - Ground plane meandering in Z direction for An antenna has a spiral driven element that meanders in a z direction, perpendicular to the x-y plane of the spiral, and a ground plane that also meanders in the z direction, such that spacing between the ground plane and the driven element is an odd multiple of one-quarter wavelength, along at least a portion of the length of the driven element. Spiral Antennas for Communication Engineering …
Study of UHF and VHF Compact Antennas - Arrow@DIT
IEEE Xplore. Delivering full text access to the world's highest quality technical literature in engineering and technology. A slot spiral in carbon-fibre composite laminate as a ... Conformal load-bearing antenna structures, which afford load-bearing structures with radar capability, are a promising technology to reduce weight and drag of air vehicles. This article presents an investigation of the mechanical and electromagnetic performance of slot log-spiral antenna in carbon-fibre composite structures. Compared with traditional rectangular slots, equiangular slot spiral ... Spiral antenna - Wikipedia In microwave systems, a spiral antenna is a type of RF antenna.It is shaped as a two-arm spiral, or more arms may be used. Spiral antennas were first described in 1956. Spiral antennas belong to the class of frequency independent antennas which operate over a wide range of frequencies. Polarization, radiation pattern and impedance of such antennas remain unchanged over large bandwidth.
(PDF) Numerical Analysis of a Wideband Thick Archimedean ...
CPW-Fed Circularly Polarized Slot Antenna with Elliptical-Shaped ... CPW-fed broadband circularly polarized square slot antenna with a widened L- type strip ... protruding a T-shaped metallic strip from the ground plane toward the slot center [12] and using spiral .... meander line loaded,” Electronics Letters, vol. Recent Developments of Reconfigurable Antennas for Current ... - MDPI 26 Jan 2019 ... can be tuned by loading the varactor on the meander-line slot. ..... antenna can operate at the frequency bands of wireless broadband (Wibro), ... Complex Spiral Antenna with Low Radar Cross Section Level An ultra-wideband (UWB) circularly polarized complex spiral antenna with low radar ... of broadband spiral antenna RCS reduction by using the novel UWB FSS .
Design of wideband arrays of spiral antennas. - Tel Archives ouvertes
design and fabrication of wideband archimedean spiral antenna ... 13 Aug 2012 ... of the planar Archimedean spiral antenna, due to the use of paper ..... Filipovic, D. S. and J. L. Volakis, “Broadband meanderline slot spiral ... Design of UWB Planar Monopole Antennas with Etched Spiral Slot ...
A broadband circularly polarized cavity-backed Archimedean spiral array antenna for C-band applications ... CPW-fed Archimedean spiral slot antenna and broadband artistic antenna array composed of Chinese ... M.I. Sabran, M.S.A. Rani, P.S. HallA coplanar waveguide fed two arm Archimedean spiral slot antenna with improved bandwidth. IEEE Trans ...
These spirals can be used as a separate component antenna or as broadband feeds for reflector type dish antennas. ALL LX series spiral antennas exhibit an excellent impedance match and radiation pattern control over the broad operating bands in a compact and lightweight package. US Patent for Ground plane meandering in Z direction for ... An antenna has a spiral driven element that meanders in a z direction, perpendicular to the x-y plane of the spiral, and a ground plane that also meanders in the z direction, such that spacing between the ground plane and the driven element is an odd multiple of one-quarter wavelength, along at least a portion of the length of the driven element. SINGLE-FEED CIRCULARLY POLARIZED ANNULAR SLOT ANTENNA FOR ... annular slot antenna is obtained by employing two square slots, a bended microstrip line and a cavity back. Dual-band CP radiation can also be achieved by using a spiral slot [13], or a CPW-fed annular slot with two perturbation strips [14]. In [15], a square microstrip patch antenna embedded with four slots and a crossed slot can generate Broadband Spiral Antenna - oceanmicrowave.com separate component antenna or as broadband feeds for reflector type dish antennas. ... Broadband Spiral Antenna Oceanmicrowave Co., Ltd. Tel:+86 10 83473918 http ...
IET Digital Library: Broadband meanderline slot spiral antenna A new broadband, cavity-backed slot spiral antenna is proposed. It combines variable growth rates at the centre region for improved high band radiation, with meandering in the outer turns for more efficient low band operation. A detailed characterisation of all antenna components and parameters is provided along with guidelines and recommendations for miniaturisation and realisation. (PDF) Broadband slot spiral antenna with external feed and ... Broadband slot spiral antenna with external feed and microstrip-to-slotline transition. ... Fig.3 shows the proposed slot spiral antenna with ... Broadband meanderline slot spiral antenna. A BROADBAND VHF-L BAND CAVITY-BACKED SLOT SPIRAL ANTENNA Slot spiral antennas offer the possibility for very thin and conformal designs. This report covers the physical characteristic of a cavity-backed slot spiral, as well as the associated infinite balun and termination designs. The report traces through the development and characteristics of a 6” and 18” version of the slot spiral. Simulations and