High efficiency power amplifier with novel PBG ground plane for harmonic tuning

Hang, C.Y.; Radisic, V.; Qian, Yongxi; Itoh, T.

doi:10.1109/mwsym.1999.779882

Cited by 34 publications

(11 citation statements)

References 5 publications

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“…PBG and DGS patterns inserted on the ground plane of transmission lines add the equivalent inductive and capacitive elements to transmission lines, change the characteristic impedances and effective dielectric constant, and produce a slow-wave effect. These properties have been applied successfully to sizereduction and performance improvement of microwave circuits [5,6]. Especially, interest and study for DGS are increasing widely because the equivalent circuit elements are extracted relatively clearly and even a few element show advantages of modified ground structures.…”

Section: Introductionmentioning

confidence: 99%

Design of a miniaturized branch line coupler using common defected ground structure

Lim

Lee

Jeon

et al. 2012

Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation

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A design of size-reduced 90 o branch line coupler (BLC) is described in this work. A common defected ground structure (CDGS) is adopted to design the coupler. Common DGS patterns are realized on the common ground plane of double-sided microstrip lines of which ground planes are attached to each other back-to-back. The CDGS patterns play a great role in size-reduction of microwave circuits. As an example, a BLC is designed, fabricated and measured at 1GHz for the verification of the size-reduction using CDGS. The size of the fabricated coupler is less than 50% of the normal one without any critical degradation in performances. The measured Sparameters well agree with the simulation results.

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Section: Introductionmentioning

confidence: 99%

Design of a miniaturized branch line coupler using common defected ground structure

Lim

Lee

Jeon

et al. 2012

Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation

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“…The PBG structure that is using the periodic discontinuous structure has the suppression characteristics on wide band frequency [5][6][7]. The PBG structure was optimized to suppress the second harmonic of the amplifier [8,9].…”

Section: Introductionmentioning

confidence: 99%

High linearity and high power added efficiency power amplifier by employing adaptive bias and PBG structure

Cho

Seo

2006

Micro & Optical Tech Letters

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In this article, adaptive bias circuit and PBG structure have been employed to achieve high power added efficiency (PAE) and high third‐order intermodulation (IM3) suppression in power amplifier simultaneously. The dc bias voltage of the gate in FET has been controlled by envelope of the input signal. The PBG structure has been employed to suppress IM3 on the output port of the power amplifier. The PBG structure was optimized to suppress the second harmonics of the amplifier. IM3 and PAE of the proposed power amplifier using adaptive bias circuit and PBG structure has been improved by 2.73 dBc, and by 35.54%, respectively. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 443–446, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22158

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“…High-efficiency amplifier, filter, and mixer designs using PBG have been reported [2,3]. Also, the defected ground structure (DGS) of a complex periodic ground pattern has been also researched [4] and directional-coupler, filter, and poweramplifier designs using DGS have been reported [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A new single balanced diode mixer with DGS cell lowpass filter

Kim

Yun

Lee

2004

Micro & Optical Tech Letters

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In this paper, a single balanced diode mixer using harmonic‐suppressed defected ground structure (DGS) low‐pass filter (LPF) with dumbbell shape is presented. The frequency bandwidth selected is C‐band, with 5.72–5.82 GHz for RF, 5.58–5.68 GHz for LO, and 140 MHz for IF signals. A rat‐race hybrid is designed for the accomplishment of the single balanced type of mixer. A low‐pass filter using DGS is used for good conversion loss and unwanted 2nd and 3rd harmonic suppression. The mixer is compared to a reference mixer with conventional low‐pass filter. When an LO signal with power of 4 dBm at 5.635 GHz is injected, a conversion loss of 6.2 dB is observed for the mixer. Also, LO‐to‐RF and LO‐to‐IF isolations of 30 dB and 40 dB are obtained, respectively. This mixer can be used in the area for wireless LAN application. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 423–425, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20489

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High efficiency power amplifier with novel PBG ground plane for harmonic tuning

Cited by 34 publications

References 5 publications

Design of a miniaturized branch line coupler using common defected ground structure

Design of a miniaturized branch line coupler using common defected ground structure

High linearity and high power added efficiency power amplifier by employing adaptive bias and PBG structure

A new single balanced diode mixer with DGS cell lowpass filter

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