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This paper presents a RFID tag antenna at 900MHz which has a wide frequency band, meeting that of Chinese standard from 860MHz to 960MHz, and it possesses easy conjugate impedance matching property by adopting an arc-shaped feeding. With a typical antenna impedance of Monza3 (Impinj), the proposed tag of compact size 30×70mm2 has a stable performance through 100MHz frequency bandwidth.
The simple rectangular patch antenna is designed at frequency 7 GHz and matched impedance with 50 ohms of transmission line. The technique to achieved widest bandwidth from 3 GHz to 12 GHz coverage standard of UWB applications is proposed by etches out slot on the ground plane with inset technique. The configuration and the size of slot on the ground plane are important to enhanced bandwidth, and...
A 2-6 GHz WiMAX low noise amplifier (LNA) is designed and implemented in 0.18-??m CMOS process. This low noise amplifier utilizes a current-reused technique, and a high-pass input matching network. The LNA presents a maximum power gain of 18.4 dB at 2 GHz. The minimum noise figure (NF) is 2.1dB. S11 is less than -16 dB. The total power consumption is 17.4 mW under a 1.8 V power supply. The chip size...
In this paper, we present a new wideband low noise amplifier which operate in UHF band for spectral sensing in the receiver of cognitive radios. The circuit employs the noise-canceling technique, and can achieve the higher gain and lower power dissipation. The method of shunt-resistive feedback is adopted for achieving a broad bandwidth. The LNA is designed by the CMOS 0.18 um RF technology. Simulated...
In this paper, a direct up-conversion mixer with wide intermediate frequency (IF) bandwidth is designed and fabricated for 60-GHz applications. The up-converted differential signal is transformed to single-ended signal through an on-chip balun. In addition, an injection-locked frequency tripler is integrated for local oscillator signal generation. The measured results shows the maximum conversion...
Two tunable matching networks, one with three bits and one with six bits, are designed, fabricated and measured. The tuning elements of the networks are the Radant RMSW-100 SPST MEMS switches. These switches connect fixed line- loading capacitances to the networks. Tapered transmission lines are used instead of uniform lines in the networks. The 6-bit network exhibits two bands with bandwidths of...
In this paper the design of a high gain low noise amplifier is presented. The LNA was successfully designed to operate over VHF and UHF ranges according to DVB-T specifications. The novelty of the design lies in the achievement of low noise figure across a wide bandwidth and high reverse isolation level. The latter was required in order to integrate the front-end block to a direct-conversion receiver...
This paper deals with the problem of realizing wideband receiver front-ends in downscaled CMOS technologies, which are highly wanted for multi-standard radio receivers and cognitive radio applications. Instead of using many narrowband inductor based receivers, we prefer the use of one wideband receiver with sufficient bandwidth to cover all popular frequency bands up to 6 GHz or even 10 GHz. To relax...
Using traditional RFIC design architecture a broadband regenerative frequency divider is designed. By integrating the frequency divider in a single IC the size is reduced and the bandwidth is increased without compromising the phase noise performance. A one octave bandwidth, 3.2-6.4 GHz, is achieved with a phase noise floor below -157 dBc/Hz. For a narrower frequency band, 4.0-5.6 GHz, a phase noise...
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