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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
More filters
Journal ArticleDOI
TL;DR: In this paper, a planar 180° phase shifter with excellent phase and amplitude balance is presented and a new wideband millimeter-wave planar balun is proposed for the first time.
Abstract: In this letter, a novel wideband 180° phase shifter with excellent phase and amplitude balance is presented and a new wideband millimeter-wave planar balun is proposed for the first time. The proposed balun consists of a wideband Wilkinson divider for power splitting followed by two microstrip-coplanar stripline (CPS)-microstrip transitions for broadband 180° phase shift. Good broadband phase and amplitude balance performances are achieved according to the inherent wideband characteristics of the Wilkinson divider and microstrip-CPS-microstrip transition and symmetry of the structure. A new ka-band planar balun has been fabricated and measured. Measured results show that the return loss, isolation, amplitude imbalance, and phase imbalance are better than 10 dB, 14.4 dB, 0.8 dB, and 3.1° , respectively, over the specified frequency range from 26.5 to 40 GHz.

19 citations

Journal ArticleDOI
TL;DR: An inductorless wideband balun low noise amplifier (LNA) for low power sub-GHz IoT applications and uses nMOS-pMOS configuration for doubling the transconductance and gain efficiency.
Abstract: This brief presents an inductorless $g_{m}$ -boosted wideband balun low noise amplifier (LNA) for low power sub-GHz IoT applications. The proposed common source (CS) - common gate (CG) based $g_{m}$ -boosted balun LNA uses nMOS-pMOS configuration for doubling the transconductance and gain efficiency. Loads of CS and CG stages are capacitively coupled to remove the tradeoff between voltage gain and voltage headroom. In addition to this, the circuit employs noise cancelation using the CS-CG pair. The LNA is implemented in 0.18 $\mu \text{m}$ RFCMOS process, which achieves a maximum voltage gain of 19.6 dB with a minimum noise figure (NF) of 3.6 dB. The 3-dB bandwidth ranges from 0.13 GHz to 0.93 GHz. The minimum IIP3 and IIP2 measured are −8.5 dBm and 12 dBm, respectively. The LNA core area is 0.18 $mm^{2}$ and dissipates a total power of 3 mW from 1.8 V power supply.

19 citations

Patent
13 Dec 2001
TL;DR: In this paper, a duplexer includes an input/output line, a receive segment and a transmit segment, and a differential filter shorts the first output and the second output at transmit band frequencies.
Abstract: A duplexer includes an input/output line, a receive segment and a transmit segment. The transmit segment is connected to the input/output line. The receive segment includes a balun and a differential filter. The balun includes a first output, a second output, a first transmission line and a second transmission line. The first transmission line is connected between the input/output line and the first output. The second transmission line is connected between the input/output line and the second output. The differential filter is connected to the first output and the second output. The differential filter shorts the first output and the second output at transmit band frequencies of the duplexer.

19 citations

Proceedings ArticleDOI
14 Sep 2000
TL;DR: This paper analyzed three types of up-conversion mixer architectures for PCS applications using f/sub T/=25 GHz Si bipolar process and proposed an optimum architecture that combines the mixer cell with an active balun that provides high linearity and LO suppression.
Abstract: This paper analyzed three types of up-conversion mixer architectures for PCS applications using f/sub T/=25 GHz Si bipolar process. An optimum architecture that combines the mixer cell with an active balun is proposed. The balun provides high linearity and LO suppression. Simulation results shows conversion gain=0 dB, LO to RF leakage=24.8 dBm, output third-order intercept point (OIP/sub 3/)=9.6 dBm, and output 1 dB compression point (OP/sub 1 dB/)=-0.2 dBm, respectively, at f/sub RF/=1.9 GHz, f/sub IF/=100 MHz, 3 V supply voltage, and 24.6 mA current.

19 citations

Patent
23 Jan 2008
TL;DR: In this paper, a super-broadband low-noise amplifier using noise canceling technology belonging to the technical field of radio frequency integrated circuit is presented. But the performance of the amplifier is not evaluated.
Abstract: The present invention relates to a super-broadband low-noise amplifier using noise canceling technology belonging to the technical field of radio frequency integrated circuit. A circuit structure of the low-noise amplifier comprises a differential input circuit, a Balun circuit, a matching circuit an amplifying circuit and a load circuit in sequence. The circuit structure adopts a connection of common gate and source for the amplifying circuit. Firstly, thermal current noise input into a common gate tube trench is amplified to effectively cancel the noise at a differential end. Secondly, gain of the circuit is increased to meet system requirements.

19 citations


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