An ultra-wideband microwave balun using a tapered coaxial coil structure working from kHz range to beyond 26.5 GHz.

被引：9

作者：

Hofbauer, GA ^{[1
]}

机构：

[1] Hofbauer & Stock Microwave Corp, A-8010 Graz, Austria

来源：

2005 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM, VOLS 1-4 | 2005年

关键词：

broadband; balun; coaxial cable;

D O I：

10.1109/MWSYM.2005.1516656

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Many wideband baluns have been presented in the past using coupled lines, pure magnetic coupling or slotlines. Their limitations were set whether in high frequency or low frequency performance. Due to their lumped element bandpass representation many of them allow just certain bandwidth. The tapered coaxial coil structure allows balun operation beyond 26 GHz and down to the kHz range through partial ferrite rifling. The cable losses, cable cut-off frequency, the number of windings, the permeability of the ferrite and the minimum coil diameter limit the bandwidth. The tapering allows resonance free operation through the whole band. Many microwave devices like mixers, power amplifiers, SWR-bridges, antennas, etc. can be made more broadband with this kind of balun. A stepwise approach to the proposed structure is presented and compared to previous balun implementations. Finally a measurement is provided and some implementation possibilities are discussed.

引用

页码：551 / 554

页数：4