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The use of discontinuities in ground planes or in microstrip lines is currently employed to improve the performance of different passive circuits, such as the size reduction of amplifiers, 1 the enhancement of filter characteristics 2,3 and applications to suppress harmonics in patch antennas. 4 On the other hand,...

With the continuous trend to reduce the size of electronic modules and increase the integration levels, the integration of passive elements within the interconnection board or substrate becomes more and more a key factor. In addition to size reduction, passive integration leads to assembly cost reduction as well as...

In modern wireless communication systems, miniaturized MMIC microwave bandpass filters are required to reduce the cost and decrease the RF system design time, especially for a single RF transceiver chip. Therefore, many studies on reducing the large size of conventional bandpass filters have been made. The lumped element approach,...

Recently, there has been much research on broadband and multi-band antennas for various wireless communication systems. The ultra-wideband (UWB) regulation released by the Federal Communications Commission (FCC) in 2002, “UWB Technology,” holds great promise for a vast array of new applications that have the potential to provide significant benefits...

Communication systems in the RF band are becoming bandwidth limited. Thus, the providers of communication systems have become interested in the X-/Ku-band for the next-generation of terrestrial systems, such as satellite communications, wireless local area networks (WLAN) and local multipoint distribution systems (LMDS). The performance of high power amplifiers...

Bandstop filters (BSF) play an important role in rejecting higher harmonics and spurious responses for microwave and millimeter-wave applications. The conventional method to implement bandstop filters involves the use of shunt stubs or stepped-impedance microstrip lines with large circuit size. 1 To reduce the filter area, certain slow-wave structures,...

In the commercial and technological arena, Asia is the continent that elicits strong opinions and provokes debate. Is it an all-consuming predator with an insatiable appetite, sustained by low-cost mass production, intent on devouring the lion’s share of the market? Or is it the goose that will lay and...

Mercury Computer Systems Inc. announced that it was selected by Raytheon to provide the wideband modem subsystem platform as part of Raytheon’s recent HDR-RF Ground Modem contract from the US Air Force. Raytheon worked with Mercury Computer Systems to leverage the benefits of commercial off-the-shelf (COTS) software radio processing...

TRAK Microwave Corp. announced that it has been awarded a contract from Raytheon Integrated Defense Systems (IDS), Andover, MA, to supply several critical components for the DDG 1000 Zumwalt Program. The DDG 1000 is the lead ship of a class of next-generation multi-mission surface combatants tailored for land attack...

MI Technologies announced it has received a $9.9 M contract from Lockheed Martin MS2’s Radar Systems business to design and build a radar test and measurement system in support of the Medium Extended Air Defense System (MEADS). MEADS is a mobile air and missile defense system designed to replace...