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.
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Patent•
16 Mar 2004TL;DR: In this article, a tuned transformer balun circuit includes a transformer, a first tuning capacitor, a second tuning capacitance, a third tuning capacitor and a circuit ground, where the first, second, and third tuning capacitors resonate with the transformer to provide efficient energy transfer from the transmitter section to the antenna.
Abstract: A tuned transformer balun circuit includes a transformer balun, a first tuning capacitor, a second tuning capacitor, and a third tuning capacitor A first plate of the first tuning capacitor is operably coupled to a first node of the differential winding and a second plate of the first tuning capacitor is operably coupled to a circuit ground A first plate of the tuning capacitor is operably coupled to a second node of the differential winding and a second plate of the second tuning capacitor is operably coupled to the circuit ground A first plate of the third tuning capacitor is operably coupled to a first node of the single-end winding and the second plate of the third tuning capacitor is operably coupled to transceiver radio frequency signals, wherein, based on loading of the single-ended winding and the differential winding, the first, second, and third tuning capacitors resonate with the transformer balun to provide efficient energy transfer from the transmitter section to the antenna
17 citations
02 Feb 2009
TL;DR: In this article, a direct up-conversion mixer with wide intermediate frequency (IF) bandwidth is designed and fabricated for 60 GHz applications, where the upconverted differential signal is transformed to single-ended signal through an on-chip balun.
Abstract: In this paper, a direct up-conversion mixer with wide intermediate frequency (IF) bandwidth is designed and fabricated for 60-GHz applications. The up-converted differential signal is transformed to single-ended signal through an on-chip balun. In addition, an injection-locked frequency tripler is integrated for local oscillator signal generation. The measured results shows the maximum conversion gain of -5.6 dB, the input-referred 1-dB compression point (IP1dB) of -14 dBm, the third-order intercept point (IIP3) of -4 dBm, and 3-dB IF bandwidth of 3.5 GHz. The proposed up-conversion mixer is fabricated using 0.13-μm standard CMOS technology, and it draws only 2.25 mA from 1.2-V supply.
17 citations
10 Jul 1991
TL;DR: In this article, two novel passive balun structures for use in MMICs (microwave monolithic integrated circuits) are described and a family of designs for 6-18 GHz and 6.15-13.5 GHz bands has been established.
Abstract: Two novel passive balun structures for use in MMICs (microwave monolithic integrated circuits) are described. They are especially relevant to wideband push-pull power amplifiers, being capable of handling several watts of power. They operate over bandwidths of up to 3:1 and can provide large impedance level transformations. Exact network synthesis procedures are used to generate prototypes and a three-dimensional field simulator is used to verify the corresponding physical circuits. A family of designs for 6-18 GHz and 6.15-13.5 GHz bands has been established. >
17 citations
TL;DR: In this article, stub arrays and indented waveguides are used to suppress the resonances excited in the slit region which is needed to accommodate wide substrates for wide circuits/wafers.
Abstract: Microstrip transitions for wide circuits/wafers are proposed using stub arrays (SAs) and indented waveguides (IWs) Full-wave analysis is performed to show that the proposed techniques can effectively suppress the resonances excited in the slit region which is needed to accommodate wide substrates H -band waveguide-to-microstrip transitions consisting of two directors, dipole antenna, and balun were fabricated including the proposed techniques, accommodating a 1220-μm-wide substrate which is about three times the width of WR-03 standard waveguide (430 μm) The slit region is 1300 μm wide and 90 μm high The comparison of measurement results between four transitions proves that the proposed SAs and IWs can successfully eliminate in-band resonances and greatly enhance the bandwidth of the transitions The transition with both SAs and IW exhibits the best performance, a back-to-back loss of 23 dB across 234–314 GHz, where the variation in the insertion loss was less than ±05 dB This insertion loss includes the losses in the microstrip line and 3-cm-long waveguide section The return loss is better than 137 dB in this frequency range Bandwidth for 10-dB return loss is as large as 97 GHz from 227 to 324 GHz
17 citations
Patent•
09 Jul 1997
TL;DR: The use of two mixer cells (110, 110') in novel embodiments of quadrature and image reject mixers is disclosed in this article, where CPW to slot line power dividing baluns for use within and without such mixers are also disclosed.
Abstract: Mixer assemblies (100) including mixer cells (110, 110'), baluns (112), quadrature mixers and image reject mixers, etc. The mixer cell may contain CPW strip RF input and slot line strip LO input. LO signal return is provided through a flip-chip (160, 160') mounted to a mixer contact area (140, 140') and the CPW RF input is preferably coupled to the contact area (140, 140') through a distributed or flip-chip mounted capacitor (136, 136'). The use of two mixer cells (110, 110') in novel embodiments of quadrature and image reject mixers is disclosed. CPW to slot line power dividing baluns for use within and without such mixers are also disclosed.
17 citations