5-GHz and 2.4-GHz dual-band RF-transceiver for WLAN 802.11a/b/g applications

Klepser, B.-U.; Punzenberger, M.; Ruhlicke, T.; Zannoth, M.

doi:10.1109/rfic.2003.1213888

Cited by 48 publications

(20 citation statements)

References 4 publications

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“…To obtain the power match at resonance the real part of the input impedance also must be equal to source resistance. For the noise figure calculation, the size of the input transistor is chosen such that it minimizes the noise as shown in the following expression [5]: 4w Fmin 1+ _ y(-|c|) (1) where (T= gm/Cgs the unity gain frequency with gm is the transistor transconductance and Cgs is the gate source capacitor. y = 3/2 is the channel thermal noise, c is the complex correlation term equals to jO.395, 6 = 4/3 is the coefficient of gate noise.…”

Section: The Inductive Degenerationmentioning

confidence: 99%

“…In the 5 GHz frequency range, the IEEE 802.1 la wireless LAN (WLAN) standard which is based on an orthogonal frequency division multiplexing (OFDM) modulation technology is compatible with data rates up to 54 Mbps [1]. The IEEE 802.1 la WLAN standard provides nearly five times the data rate and as ten times the overall system capacity as currently available IEEE 802.1 lb WLAN systems [2].…”

Section: Introductionmentioning

confidence: 99%

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A 1-V 5 GHz Variable Gain Low Noise Amplifier in 0.18-μm CMOS

Alam

DeGroat

2006

2006 Canadian Conference on Electrical and Computer Engineering

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This paper describes a 1-V 5 GHz fully differential variable gain low noise amplifier (VGLNA) in a 0.18-pm CMOS process. The LNA provides 50-Q input impedance and utilizes a tuned load to provide high selectivity. The VGLNA achieves a maximum small signal gain of 10.11 dB within 1-dB compression point (iCP]dB) of -16.0 dBm and a minimum gain of 1.6 dB within iCP]dB of -14.5 dBm. In the high gain and low gain modes, the noise figures (NFs) are 1.94 dB and 3.96 dB, respectively with good input return loss. The LNA's 11P3 in the high gain mode is -5.15 dBm. The LNA consumes only 6.4 mA ofcurrentfrom a 1-Vpower supply.

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Section: The Inductive Degenerationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 1-V 5 GHz Variable Gain Low Noise Amplifier in 0.18-μm CMOS

Alam

DeGroat

2006

2006 Canadian Conference on Electrical and Computer Engineering

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“…There have been some presentations of the dual band transceiver and they have used two separate RF modules at each band [5]. However, the difficulty to achieve satisfactory performance in the RF hardware over wide bandwidths drives designers toward architectures that incorporate dual-band transceiver architectures which switch their signal paths for different bands in different working situation.…”

Section: Introductionmentioning

confidence: 99%

A Novel Dual Band Transmitter Using Microstrip Defected Ground Structure

Chen¹,

Shi²,

Guo³

et al. 2008

PIER

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Abstract-This paper presented a novel dual band transmitter which operates as power amplifier or frequency doubler with the stop band characteristic of defected ground structure (DGS). It works as a power amplifier at 2.4 GHz which satisfies the 802.11b/g wireless LAN standard or performs as an active frequency doubler at 6.8 GHz which depends on the input frequency and. The equivalent circuit and the stop band characteristic of the proposed microstrip DGS are analyzed and simulated. For the proposed transmitter, second harmonic suppression is below −52.6 dBc in the amplifier mode, and fundamental suppression is below −41 dBc in the frequency doubler mode with the stop band characteristic of DGS. The designed transmitter used GaAs InGaP Heterojunction broadband MMIC. It achieves 13.7 dBm of P 1 dB and its gain is 16.5 dB in amplifier mode, and its maximum output power is 7.8 dBm at 6.8 GHz in frequency double mode.

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“…Dual-band solutions have also been reported in SiGe technology [4] or in a two-chip CMOS solution [5]. This study describes a single-chip dual-band tri-mode 0.18-m CMOS radio transceiver compliant with the IEEE 802.11a, b, and g standards.…”

mentioning

confidence: 99%