A wideband balun from coaxial line to TEM line

Foster, P.R.; Tun, Soe Min

doi:10.1049/cp:19950311

Cited by 7 publications

(3 citation statements)

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“…A trade-off has to be found. According to Foster (Foster & Tun, 1995), the length of such a transition must be a one quarter of the lowest frequency wavelength. Farr gives also a simple formula (4) concerning the rise time which can be preserved in such a transition as a function of the numerous transition dimensions: The length and radial dimensions of the transition are of great importance to transform a coaxial TEM field into a double-strip TEM field in the frequency spectrum concerned.…”

Section: The "Tulipe": Impedance and Geometrical Matchingmentioning

confidence: 99%

Ultra Wideband Antennas for High Pulsed Power Applications

Cadilhon¹,

Cassany²,

Modin³

et al. 2011

Ultra Wideband Communications: Novel Trends - Antennas and Propagation

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Section: The "Tulipe": Impedance and Geometrical Matchingmentioning

confidence: 99%

Ultra Wideband Antennas for High Pulsed Power Applications

Cadilhon¹,

Cassany²,

Modin³

et al. 2011

Ultra Wideband Communications: Novel Trends - Antennas and Propagation

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“…Because of its high gain and its capability to radiate short pulses without dispersion in the frequency band 300 MHz-2.5 GHz, the Valentine antenna [4,5] was chosen to be the radiating element of high-power UWB sources. A mechanical matching of the antenna, using the time-domain electromagnetic software CST Microwave Studio, was done to improve its dielectric strength.…”

Section: Experimental Investigationsmentioning

confidence: 99%

Development of a Fast Marx Generator for High Power Ultra Wideband Pulse Radiation

et al. 2009

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We present in this paper the design and realisation of two autonomous, ultra wideband radiation sources consisting of a high gain broadband antenna driven by two subnanosecond pulsed power sources. Each one is made of a Marx generator and a pulse forming device based on the use of gaseous spark gap. The main pulsed source is a ten stage subnanosecond Marx generator which delivers pulses in the range of 250 kV/1.5 J, with a 300 ps rise time, subnanosecond pulse duration at a pulse repetition frequency of 350 Hz. The antenna combined with the pulsed source is a travelling wave antenna called Valentine antenna. Some mechanical modifications were made to improve the dielectric strength of this radiation element. A 3D model of the antenna, on a time domain electromagnetic software, was first performed to study the influence of these modifications on the main radiating characteristics of the antenna. Its high gain and its capability to radiate short pulses without dispersion allow us to achieve a high measured figure of merit.

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“…These solutions mainly include: (a) UWB omni‐directional antenna, of which wafer monopole antenna is the representative which gives bandwidth larger than 25%, (b) wide slot antennas , including all kinds of wide‐slot coupled feed antennas whose gains are low; (c) antennas with resistance gradual changing structure, including (transverse electric and magnetic) some UWB directional antennas, such as Vivaldi antenna, TEM horn antenna, and ridged horn antenna , (d) frequency independent antennas, including equiangular and Archimedean spirals, log‐periodic dipole antennas, and so on . However, most of these kinds of antennas are limited by their large volume for certain applications.…”

Section: Introductionmentioning

confidence: 99%

Ultra wide band planar printed quasi‐Yagi antenna with size reduction for water detection in the Egyptian desert

Elsheakh

Abdallah

2014

Micro & Optical Tech Letters

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Ultrawideband quasi‐Yagi antenna with size reduction is presented for developing the ground penetrating radar system. The proposed antenna printed on FR‐4 substrate and consists of meandered driver dipole, a radial quarter‐wavelength stubs, and two meandered parasitic strips. The meandered driver dipole is connected to the slot line through coplanar strip line. The ground plane is modified by symmetrically adding two extended folded meandered stubs to reduce the lateral size. The results show that the proposed quasi‐Yagi antenna has a wide bandwidth and good unidirectional radiation characteristics. The −10 dB impedance bandwidth extends from 47 to 150 MHz with 45% size reduction and average gain around 4.5 dBi over operating band with very flat gain (around 5 dB) over the entire bandwidth. The proposed antenna presents an excellent end‐fire radiation with a front‐to‐back ratio greater than 10 dB. Simulations and measurements show very good agreement with the proposed antenna. High frequency structure simulator is used to design and study the effect of sandy soil, water layer and the distance between sand and proposed antenna. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:226–233, 2015

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A wideband balun from coaxial line to TEM line

Cited by 7 publications

References 0 publications

Ultra Wideband Antennas for High Pulsed Power Applications

Ultra Wideband Antennas for High Pulsed Power Applications

Development of a Fast Marx Generator for High Power Ultra Wideband Pulse Radiation

Ultra wide band planar printed quasi‐Yagi antenna with size reduction for water detection in the Egyptian desert

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