Topic
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 published on a yearly basis
Papers
More filters
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11 Jun 1998TL;DR: In this paper, a doubly balanced monolithic ring mixer using a unique planar balun consisting of a Marchand section followed by a coupled-line structure is described, which achieves low conversion loss and high isolation over an 18-40 GHz RF/LO bandwidth and a dc-10 GHz IF bandwidth.
Abstract: This paper describes a doubly balanced monolithic ring mixer using a unique planar balun consisting of a Marchand section followed by a coupled-line structure. The latter provides additional even-mode rejection and a convenient point for IF extraction. The mixer achieves low conversion loss and high isolation over an 18-40 GHz RF/LO bandwidth and a dc-10 GHz IF bandwidth.
27 citations
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13 Dec 1972
TL;DR: In this article, a broadband high frequency balun is connectable between balanced and unbalanced transmission lines so that these lines are essentially colinear, and the addition of a lossy layer to the inner surface of the housing permits a substantial increase in the operating bandwidth of the balun by suppressing adverse resonance effects within the housing.
Abstract: A broadband high frequency balun is connectable between balanced and unbalanced transmission lines so that these lines are essentially colinear. The balun comprises a coaxial cable and a shorted stub in approximately a half-loop configuration, the balanced line being connected to the cable and stub within a conductive housing or shield. The cable-stub spacing is substantially greater than the effective length of the stub, thereby decreasing the lower frequency operating limit of the balun. The addition of a lossy layer to the inner surface of the housing permits a substantial increase in the operating bandwidth of the balun by suppressing adverse resonance effects within the housing.
27 citations
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01 Nov 2010TL;DR: In this paper, a 160-GHz downconversion frontend for imaging arrays fabricated in a SiGe HBT technology is presented, which is compatible with balanced on or off-chip antennas consisting of a three-stage LNA with 24 dB gain and Gilbert-cell mixer operating from −7dBm fundamental LO signal.
Abstract: A 160-GHz downconversion front-end for imaging arrays fabricated in a SiGe HBT technology is presented. The front-end features a fully differential architecture compatible with balanced on or off-chip antennas consisting of a three-stage LNA with 24 dB gain and Gilbert-cell mixer operating from −7dBm fundamental LO signal. The downconverter consumes 50 mA from a 3.3V supply and requires is 0.1 mm2 die area (excl. pads) per channel. With an 160-GHz input signal and an IF frequency of 150 MHz, the implemented front-end yields a 27-dB conversion gain and a 7.4-dB/9.5-dB (without/with auxiliary on-chip input balun) system noise figure.
27 citations
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TL;DR: In this article, a bandpass push-pull high-power amplifier (PA) based on substrate integrated waveguide (SIW) filtering balun power divider is proposed, where complementary split rings resonators (CSRRs) defected in the balun based on the SIW.
Abstract: A bandpass push–pull high power amplifier (PA) based on substrate integrated waveguide (SIW) filtering balun power divider is proposed in this article. The filtering characteristic of the PA is realized by the complementary split rings resonators (CSRRs) defected in the balun based on the SIW. Inherent to the middle metal plane of the SIW balun, the 180° phase difference power division can be achieved. Due to the natural differential characteristic of the balun, the proposed design can produce second-harmonic suppression. Greater output power is obtained owing to the filtering balun power combiner. For the fabricated bandpass push–pull PA, it exhibits high-selectivity bandpass response and good PA performance with the peak power-added efficiency (PAE) of 48.7% at 38.5-dBm output power.
27 citations
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11 May 2010
TL;DR: An energy applicator for directing energy to tissue includes a feedline having an inner conductor, an outer conductor and a dielectric material disposed therebetween, and an antenna assembly having a radiating section operably coupled to the feedline.
Abstract: An energy applicator for directing energy to tissue includes a feedline having an inner conductor, an outer conductor and a dielectric material disposed therebetween, and an antenna assembly having a radiating section operably coupled to the feedline. The energy applicator also includes a first balun structure configured to substantially confine energy to the radiating section when the energy applicator is energized and disposed in tissue, and a second balun structure configured to substantially prevent energy emitted from the radiating section from propagating proximal to the second balun structure along the feedline when the energy applicator is energized but not disposed in tissue.
27 citations