Novel 900 MHz/1.9 GHz dual-mode power amplifier employing MEMS switches for optimum matching

Fukuda, Atsushi; Okumura, Hiroshi; Hirota, Tomoyoshi; Yamao, Yasushi

doi:10.1109/lmwc.2003.821496

Cited by 44 publications

(18 citation statements)

References 3 publications

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“…For example, Table 6 shows the calculated results of the loss of the MR-MN employing one section, L n1 , for matching in individual bands when R sw = 0.5 Ω, which is achieved by the MEMS switch employed in previous studies [14]- [16].…”

Section: Discussionmentioning

confidence: 99%

“…The MR-MNs proposed in [14] provide practical configurations for a reconfigurable MN. Figure 3 shows the basic configuration as the output MN for N-band operation.…”

Section: Basic Configuration For Mr-mnmentioning

confidence: 99%

“…This type of structure represents a promising solution because it has a reasonably sized circuit configuration considering multiple band operation while providing adequate characteristics. There have been reports on a 1-W class band reconfigurable PA employing micro-electro-mechanical systems (MEMS) Single-Pole-Single-Throw (SPST) switches [14]- [16] as variable devices. The PA includes multi-section reconfigurable MNs (MR-MNs), which basically have one switch in one section as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier

Fukuda

Furuta

Okumura

et al. 2012

IEICE Trans. Electron.

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SUMMARYThis paper presents a novel design scheme for a bandswitchable multi-band power amplifier (BS-MPA). A key point of the design scheme is configuring multi-section reconfigurable matching networks (MR-MNs) optimally in terms of low loss matching in multiple frequency bands from 0.7 to 2.5 GHz. The MR-MN consists of several matching sections, each of which has a matching block connected to a transmission line via a switch. Power dissipation at an actual on-state switch results in the insertion loss of the MR-MN and depends on how the impedance is transformed by the MR-MN. The proposed design scheme appropriately transforms the impedance of a high power transistor to configure a low loss MR-MN. Numerical analyses show quantitative improvement in the loss using the proposed scheme. A 9-band 3-stage BS-MPA is newly designed following the proposed scheme and fabricated on a multi-layer low temperature co-fired ceramic substrate for compactness. The BS-MPA achieves a gain of over 30 dB, an output power of greater than 33 dBm and a power added efficiency of over 40% at the supply voltage of 4 V in each operating band.

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Section: Discussionmentioning

confidence: 99%

“…The MR-MNs proposed in [14] provide practical configurations for a reconfigurable MN. Figure 3 shows the basic configuration as the output MN for N-band operation.…”

Section: Basic Configuration For Mr-mnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier

Fukuda

Furuta

Okumura

et al. 2012

IEICE Trans. Electron.

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“…It is quite difficult to realize characteristics similar to those of a single amplifier. There are only a few reports on power amplifiers [10][11][12].…”

Section: (4) Multifrequency Matchingmentioning

confidence: 99%

Microwave dual-band power amplifiers using two-frequency matching

Takayama

Uchida

Fujita

et al. 2006

Electron. Comm. Jpn. Pt. II

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SUMMARYIn order to deal with a variety of wireless communication systems, multichannel capabilities are being introduced into cellular phones. In the future, in order to attempt reduction in size and weight by using multichannel capabilities of various wireless devices, it will be necessary to realize multichannel operation of passive circuit elements, mixers, and amplifiers. This paper presents the current status of multichannel operations of active circuits, especially amplifiers, for which multichannel capabilities are difficult to provide. In addition, the status and challenges of the microwave dual-frequency matched dual-band GaAs FET power amplifiers being developed by the authors' group on the basis of the low-pass Chebyshev impedance transformers are discussed .

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“…Different solutions have been suggested to solve these problems, the use of switches [1,2] being the most widely implemented, although other topologies based on MMICs [3] have proven their validity.…”

Section: Introductionmentioning

confidence: 99%

Dual Band High Efficiency Class Ce Power Amplifier Based on CRLH Diplexer

Martín¹,

González-Posadas²,

Gonzalez-Garcia³

et al. 2009

PIER

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Abstract-In this paper, the most adequate architecture to implement dual frequency amplifiers is shown. Composite Right/Left Hand (CRLH) and Extended Composite Right/Left Hand (ECRLH) transmission lines are studied and evaluated to find the most suitable structure for dual band power amplifiers. As an example, the performance of a class CE amplifier, working in TETRA and GSM frequency bands, is compared with simulations and measurement, showing good agreement. INTRODUCTIONThe increasing demand for wireless systems requires the use of higher frequency spectrum. Such high frequencies entail two major drawbacks: First, line transmission losses increase significantly. And second, solid state devices present power limitations at radio frequency (RF). Besides, when high RF power is demanded, there are some problems related with conventional system design and implementation, which can be overcome combining several RF devices to achieve the desired level. Another problem arises from the need of multifunction transponders to cope with several services, usually allocated at different frequencies, in the only terminal, being a well known example multiband or even GPS mobile phones. As a result of all these drawbacks, the development and use of multi-frequency highperformance power amplifiers is required. In this paper, TETRA Corresponding author: V. Gonzalez-Posadas (vgonzalz@diac.upm.es).

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Novel 900 MHz/1.9 GHz dual-mode power amplifier employing MEMS switches for optimum matching

Cited by 44 publications

References 3 publications

Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier

Low-Loss Matching Network Design for Band-Switchable Multi-Band Power Amplifier

Microwave dual-band power amplifiers using two-frequency matching

Dual Band High Efficiency Class Ce Power Amplifier Based on CRLH Diplexer

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