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Industry News

Software Update

EMC Test Software The model SW1006 is the latest version of the company’s radiated susceptibility, conducted immunity and pre-compliance emissions software. Model SW1006 automatically performs both calibration and immunity testing in full compliance with IEC 61000-4-3, 4-6, MIL-STD 461/462 RS103, CS114, RTCA/DO160 Section 20 specifications. The software also supplies...
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RF Components and Systems

Ultra Broadband Bias Tee The model BT-50K18 Option PS is a miniature 50 kHz to 18 GHz bias tee, usable to 15 kHz. It has an insertion loss of 0.75 dB and a VSWR of 1.75 is typical. This model offers 60 dB RF/DC isolation between 10 MHz and...
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New Literature

Application Note This application note, “Preamplifiers and System Noise Figure,” is designed to assist engineers in learning how to improve the accuracy of their measurements by using a low noise amplifier in front of a spectrum analyzer to reduce the effective noise figure of RF and microwave test systems....
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The Book End

The Design of CMOS Radio-frequency Integrated Circuits: Second Edition Thomas H. Lee Cambridge University Press • 815 pages; $80 ISBN: 0-521-83539-9 Since publication of the first edition of this book in 1998, RF CMOS has made a rapid transition to commercialization. Back then, the only notable examples of RF...
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A CMOS Frequency Synthesizer with Self-biasing Current Source for a 5 GHz Wireless LAN Receiver

This article describes a fully integrated 3.2 GHz synthesizer with a self-biasing current source for a 5 GHz wireless LAN receiver in the lower UNII band from 5.15 to 5.35 GHz. The circuit has been designed using a 0.18 mm one-poly six-metal CMOS techn...
In the past several years, the wireless local area network (WLAN) market has grown significantly due to the great demand for high speed wireless connectivity. Furthermore, there is a constant desire to keep power consumption, cost and size of the communication devices to a minimum. This has been possible...
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Design of a Novel Quad-band Microstrip BPF Using Quarter-wavelength Stepped-impedance Resonators

In this article, a new quad-band microstrip bandpass filter (BPF) is proposed. The BPF is composed of resonators whose first four resonant frequencies can be tuned to the desired passbands. Each resonator is formed by combining two unequal-size stepped...
Due to the increasing competition in the global wireless communication markets, many wireless terminals, such as mobile phones, personal dispatching assistants (PDA) and laptop computers, are being constructed to integrate more than one communication standard into the same apparatus. This allows the end-users to access different systems that provide...
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A Compact Microstrip Stepped-impedance Resonator and Filter

The resonant performance of T-shaped microstrip resonators, a kind of stepped-impedance resonator (SIR), is computed and analyzed. Two novel SRI filters, a double-T-shaped bandstop filter and a double-H-shaped bandpass filter, are designed and their pe...
Microstrip resonators have very important applications in microwave or millimeter-wave systems. They are important components of microstrip filters,1–2 microstrip oscillators3 and microstrip antennas,4 and enable microwave equipment miniaturization with improved performance. A stepped-impedance resonator (SIR) is the fundamental resonant element that can operate from RF to millimeter-wave frequencies and...
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A 40 to 900 MHz CMOS Broadband Differential LNA for a DTV RF Tuner

This article describes a 40 to 900 MHz CMOS broadband differential LNA with gain control for a DTV RF tuner application. The LNA is fabricated in a TSMC 0.18 µm CMOS process. The broadband differential LNA uses dual-feedback and shunt-shunt feedback to...
Digital TV offers a far wider choice of TV viewing and a reduction of the interference that may be experienced on analog TV. Recently, many RF circuits realized in the CMOS process have been reported and the 0.18 mm process is a good candidate for highly integrated systems-on-chip (SOC)...
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