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Balun

About: Balun is a research topic. Over the lifetime, 5375 publications have been published within this topic receiving 52256 citations. The topic is also known as: Telephone balance unit.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors present the design and performance of a very compact MMIC star mixer, composed of four diodes and two lumped dual baluns which are realized using two high/low-pass out-of-phase power splitters in parallel.
Abstract: The authors present the design and performance of a very compact MMIC star mixer. The mixer is composed of four diodes and two lumped dual baluns which are realised using two high/low-pass out-of-phase power splitters in parallel. The MMIC star mixer shows wide bandwidth, high PldB, high third order intercept (IP3) point and high port-to-port isolations both in the applications of up and down converter. The chip size of this star mixer is much smaller than those of the conventional mixers. To the best of the authors' knowledge, it is the smallest size ever reported for passive mixer operated at S-band.

20 citations

Journal ArticleDOI
TL;DR: In this article, a K-band balun with a slot pattern ground, based on the Marchand type, is proposed using the TSMC 0.18µm CMOS process.
Abstract: A K-band balun with a slot pattern ground, which is based on the Marchand type, is proposed using the TSMC 0.18 µm CMOS process. The slot pattern ground is applied to the balun to achieve wide bandwidth. This type of balun provides wide bandwidth of 54.5% for amplitude difference less than 1 dB and phase difference less than 5° (18.4–32.2 GHz). Also, it satisfies 10 dB return loss and 5 dB insertion loss in the operating frequency.

20 citations

Journal ArticleDOI
TL;DR: In this paper, the authors demonstrate a new slot spiral arm termination which, in conjunction with the reflecting cavity and planar infinite balun, allows for very thin yet extremely broadband spirals.
Abstract: Slot-spiral antennas utilizing very shallow reflecting cavities have previously been demonstrated by the authors for extremely broadband-conformal applications. We have previously demonstrated the importance of an integrated planar balun and feed for realizing the slot spiral's bandwidth potential. Of equal importance, is the development of a termination that is applicable to the slot radiator. In this paper, we demonstrate a new slot spiral arm termination which, in conjunction with the reflecting cavity and planar infinite balun, allows for very thin yet extremely broadband spirals. The included measurements show that a slot spiral with a diameter of 5.75" and a thickness of merely 0.5" delivers a typical gain of 5 dB/sub ic/ from 750 MHz to 4 GHz with good axial ratio performance. Additional loading (both inductive and dielectric) applied to the same spiral can extend its operational bandwidth down to 200 MHz for the same size aperture.

20 citations

Journal ArticleDOI
TL;DR: In this paper, a dual-band balun that is constructed using a pair of coupled stepped-impedance resonators is fully studied both theoretically and experimentally, and design equations for the balun are derived by an even-and odd-mode approach.
Abstract: In this paper, a recently proposed dual-band resonator structure consisting of a pair of partially coupled stepped-impedance lines is theoretically investigated. The new resonator configuration contains a number of attractive features for dual-band applications. A new type of dual-band balun that is constructed using a pair of such coupled stepped-impedance resonators is fully studied both theoretically and experimentally. Design equations for the balun are derived by an even- and odd-mode approach. A prototype of such dual-band balun operating at 900 MHz and 1.8 GHz is designed, fabricated, and measured. Good agreement between the designed and measured responses proves the concept of the dual-band balun and validates the design formulas.

20 citations

Proceedings ArticleDOI
01 Jun 2004
TL;DR: In this paper, the design, implementation, measurements, reliability data and integration of multiple RF components such as filters, baluns, diplexers, and a combination of the above on liquid crystalline polymer (LCP) based substrates for communication standards such as 802.11 a/b/g, LMDS/MMDS, satellite/digital TV, UWB, cellular and Bluetooth type applications.
Abstract: This paper presents for the first time the design, implementation, measurements, reliability data and integration of multiple RF components such as filters, baluns, diplexers, and a combination of the above on liquid crystalline polymer (LCP) based substrates for communication standards such as 802.11 a/b/g, LMDS/MMDS, satellite/digital TV, UWB, cellular and Bluetooth type applications. These components and process technologies are being targeted as a cost-effective high-performance, miniaturized alternative to the primary technologies of choice for multi-band RF/wireless applications, namely, low-temperature co-fired ceramic (LTCC), multi-layer ceramic (MLC) and ceramic monoblock technologies. The first examples of this platform substrate technology are very compact 12 mm/sup 3/ fully packaged SMT front-end filters with center frequencies of 2.45, 5.25 and 5.775 GHz. One embodiment of the filter at 2.45 GHz, which is well suited for 802.11 b/g and Bluetooth type applications, provides a passband of 100 MHz with maximum inband insertion loss less than 1.7 dB at 25/spl deg/C, greater than 25 dB attenuation at 2700-2800 MHz, greater than 10 dB attenuation below 2.2 GHz, greater than 20 dB rejection at the second and third harmonic and inband VSWR less than 1.5 matched to 50 ohms at the input and output.

20 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202361
2022242
2021130
2020280
2019327
2018310