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Industry News

RFID Swings Into 2004 with High Hopes

If 2003 was the year the market awakened to supply chain-based RFID, 2004 will surely be the year it readies for school. The two mandates for 2005, set by Wal-Mart and the US Department of Defense (DoD), pushed RFID into the public eye, and moved it from company science...
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Fixed Wireless Infrastructure Will Ride a Wave of Growth on Standards

The emergence of new standards will result in a dynamic rate of growth for Fixed Wireless Broadband (FWB), reports In-Stat/MDR. Traditionally, a lack of standards has hampered the development of FWB systems, as the proprietary nature of FWB technology kept the cost high, and limited interoperability between different vendors....
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Novel GPS Applications to Proliferate as Overall Market Grows

As consumer awareness of global position systems (GPS) increases, so has product innovation and total market revenue. While roughly half of the market today consists of sales of automotive and asset tracking equipment, these segments will still continue to grow at rates faster than that of the broader market...
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The Book End

Microwave Solid State Circuit Design Second Edition Inder Bahl and Prakash Bhartia Wiley-Interscience 906 pages; $140 ISBN: 0-471-20755-1 This is the second edition of a book that was published almost fifteen years ago. In this revision, emphasis was placed on retaining and expanding topics of current and future interest...
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A 5 GHz 0.18 µm CMOS Mixer for 802.11a WLAN Receiver Applications

This article presents a 5.7 GHz CMOS single-balanced mixer for an IEEE 802.11a WLAN receiver application. The RF input frequency of the mixer is 5.725 to 5.825 GHz, the LO frequency is 5.445 to 5.545 GHz and the IF is 280 MHz. The mixer is fabricated w...
Due to the fast growing demand for broadband wireless communications, the operating frequency band is moving toward the 5 GHz U-NII band. The advantage of combining baseband and the RF front-end on a single chip for cost savings is strongly desired for highly integrated systems-on-chip (SoC) applications. Due to...
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Printed Circuit Realization of a Capacitive-loaded Interdigital Bandpass Filter

A tapped capacitive-loaded interdigital bandpass filter has been realized using multicoupled suspended substrate stripline (MCSSS). Composite effects of multiple quasi-TEM modes and coupling between non-adjacent strips have been accounted for. Two filt...
The demand for small, compact, low cost, high performance filters, diplexers and multiplexers using MIC technologies has increased along with advances in microwave systems. Capacitive-loaded interdigital filters are compact in size, have sharp roll factor, excellent broad stopband performance and are easy to fabricate. A filter with tapped-line is...
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Design of a 5.7 GHz 0.18 µm CMOS Current-reused LNA for an 802.11a WLAN Receiver

This article presents the design, implementation and measurement of a 5.7 GHz CMOS LNA for an IEEE 802.11a WLAN receiver. The LNA, fabricated with the 0.18 µm 1P6M standard CMOS process, uses a current-reuse technology to increase linear gain and save ...
Due to the fast growing demand for broadband wireless communications, the operating frequency band is moving toward the 5 GHz U-NII band. The advantage of combining baseband and the RF front-end on one single chip for cost savings is strongly desired for highly integrated systems-on-chip (SoC) applications. Due to...
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The Effects of IP<sub>2</sub> Impairment on an 802.11a OFDM Direct Conversion Radio System

The analytical and behavior models for direct conversion receiver IP 2 nonlinear distortion characteristics have been derived. The impact of IP 2 on system EVM, BER/PER performance was simulated. The trade-offs between IP 2 distortion and other impairments, such as peak-to-average power ratio (PAPR), IP 3 , phase noise...
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A Fully-integrated 2.4/5.7 GHz Concurrent Dual-band 0.18 µm CMOS LNA for an 802.11 WLAN Direct Conversion Receiver

This article describes a 2.4/5.7 GHz concurrent dual-band CMOS LNA for 802.11 WLAN direct conversion receiver (DCR) applications using 0.18 mm technology. A fully-integrated dual-band LNA was designed, which simultaneously provides narrow-band gain and...
Fig. 1 IEEE 802.11 WLAN frequency allocations. t Due to the rapidly growing demand for broadband wireless communication, the operating frequency is moving toward the 5 GHz U-NII band. With a maximum data rate of 54 Mb/s, the IEEE 802.11a wireless LAN (WLAN) standard specifies 300 MHz allocation of...
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Small-sized Quasi-elliptic Function Microstrip Low Pass Filter Based on Defected Ground Structures and Open Stubs

In this article, a microstrip structure for a small-sized elliptic function low pass filter (LPF) is developed from a modified dumbbell-shaped defected ground structure (DGS) and additional open stubs. The steps taken in developing the structure are pr...
Defected ground structures (DGS) etched in the metallic ground plane of microstrip lines, also known as photonic bandgap (PBG) structures, are attractive to obtain unwanted frequency rejection and circuit size reduction. Research on the PBG was originally carried out in the optical regime 1,2 and has recently started with...
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