A compact, monolithic microwave demodulator-modulator for 64-QAM digital radio links

Telliez, I.; Couturier, A.M.; Rumelhard, Christian; Versnaeyen, C.; Champion, P.; Fayol, D.

doi:10.1109/22.106532

Cited by 30 publications

(6 citation statements)

References 7 publications

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“…For this reason, several techniques have been developed over time to generate accurate 90°phase shifters with low phase and amplitude errors. These include the following: (1) frequency divide-by-two circuits (DTCs) [1,2,20]; (2) resistorcapacitor, capacitor-resistor (RC-CR) networks [4][5][6]; (3) resistorcapacitor (RC) all-pass filters [3,21]; (4) inductor-capacitor (LC) high-and low-pass filters [22][23][24]; and (5) RC polyphase networks [25][26][27][28][29].…”

Section: Quadrature Phase Shiftermentioning

confidence: 99%

Compact low‐power 2.4 GHz QPSK modulator in CMOS

El-Gabaly

Saavedra

2009

Micro & Optical Tech Letters

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Section: Quadrature Phase Shiftermentioning

confidence: 99%

Compact low‐power 2.4 GHz QPSK modulator in CMOS

El-Gabaly

Saavedra

2009

Micro & Optical Tech Letters

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“…Specifications .are now well compatible with the main applications. A lot of work has been already made from L to W band [1,2,3,4,5], leading to single chips with relatively complex block diagrams. The DBS (Direct Broadcast Satellite) circuits are a well known example of low cost and high volume GaAs MIMICs components [6].…”

Section: Introductionmentioning

confidence: 99%

High Integrated MMIC Multifunctions for X Band Sensor Applications

Camiade¹,

Serru²

1994

1994 24th European Microwave Conference

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A set of single chip mult{functions has been developed at X bandfor sensor applications. This kind of circuits gathers all the necessary basic functions such as oscillators, buffer amplifiers, power dividers, modulators and mixers. The chosen technology is TCS standard process LN05 based on 0. 5pm implanted MESFET, via holes, air bridges and electron beam lithography. All of these circuits are working around 10GHz with more than 20% bandwidth. The transmitted output power is greater than lOdBm and the noisefigure is better than 7.5dB SSBfor an IF of 10MHz. The IF output can also be used at very low frequencies (from DC) and exhibits low noise with a typical value of-440dBm/Hz at IkHz.

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“…For quadrature modulation schemes such as quaternary (or quadrature) phase-shift keying (QPSK) and quadrature amplitude modulation (QAM), an in-phase channel and quadrature-phase channel (I-Q) vector modulator is widely used [3], [4]. Recently reported direct carrier frequency modulators performances are summarized in Table I. There are two generic types of microwave vector modulators.…”

mentioning

confidence: 99%

Direct multilevel carrier modulation using millimeter-wave balanced vector modulators

Ashtiani

Nam

d'Espona

et al. 1998

IEEE Trans. Microwave Theory Techn.

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The importance of being able to design affordable, high-performance, millimeter-wave transmitters for digital communications and radar applications is increasing. To this end, two monolithic millimeter-wave vector modulators have been realized at 38 and 60 GHz for use in direct multilevel carrier modulation. It is shown that, by employing balanced biphase amplitude modulator elements, accurate constellations are achieved with broad-band operation from 20 to 40 GHz and 55 to 65 GHz. Modulations of 16-and 256-QAM have been demonstrated, both at 38 and 60 GHz, using this technique. Each balanced biphase amplitude modulator uses a pair of reflection-type attenuators operated in push-pull mode. This study investigates the suitability of this topology for use as a full biphase amplitude modulator for multilevel digital modulation schemes. It is found that the technique is very robust and the resulting analog vector modulator can be a very important component for many future millimeter-wave applications.

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A compact, monolithic microwave demodulator-modulator for 64-QAM digital radio links

Cited by 30 publications

References 7 publications

Compact low‐power 2.4 GHz QPSK modulator in CMOS

Compact low‐power 2.4 GHz QPSK modulator in CMOS

High Integrated MMIC Multifunctions for X Band Sensor Applications

Direct multilevel carrier modulation using millimeter-wave balanced vector modulators

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