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Modern mobile systems impose strict requirements for bandpass filters, such as small size, high selectivity, wide upper stopband, low insertion loss and cost. A planar microstrip elliptic-function BPF is a good choice for this purpose. BPF advances on the base of circular, square and triangular patch/ring resonators have been...

Research into ultra-wideband technology has risen dramatically since the US Federal Communications Commission (FCC) authorized the frequency band of 3.1 to 10.6 GHz for commercial purposes. 1 A bandpass filter is a key component of a UWB wireless communication system. Many BPFs have been developed based on various kinds...

Some years ago CST introduced a frequency domain solver into CST MICROWAVE STUDIO® (CST MWS) in addition to its time domain solver. The company recognized that an ever increasing array of microwave/RF and high speed data applications required alternate solver technology in order to optimize speed and memory usage....

When this annual report was published a year ago, the reality of a global economic downturn had just begun to loom large. The banking and financial services sectors were the first to take a hit, but all industries, including the RF and microwave sector, were bracing themselves for the...

The High Frequency Structure Simulator (HFSS™) is a software tool for 3D full-wave electromagnetic field simulation. HFSS provides E- and H-fields, currents, S-parameters, and near and far radiated field results. Intrinsic to this engineering design tool is an automated solution process where users are only required to specify geometry,...

It goes without saying that components and sub-assemblies supporting today’s defense equipment, such as military radio receivers and counter-IED solutions, must be rugged, light and reliable. Increasingly critical, however, are a host of beyond-requisite demands that reflect today’s new military procurement and combat realities. One example is the dictum...

Sustained growth in wireless communications and greater demands for bandwidth place tremendous pressure on component manufacturers to provide high performance, surface-mount technology (SMT) packaged products. The market is seeking low-cost, SMT components for high volume printed circuit board (PCB) assembly flow, particularly for applications such as point-to-point (PTP) digital...

LINC2 Filter Pro Software Release ACS has recently released a new version of its LINC2 filter synthesis software. LINC2 Filter Pro version 1.18 adds new capabilities for exporting design and analysis data to other programs. This new version can send filter analysis data, including frequency response data, to Excel...

Power Divider Model PD0218-S2 is a two-way Wilkinson power divider that was just released and covers most military and EW bands from 2 to 18 GHz. These power dividers are available in octave and multi-octave bandwidths and are available from Aeroflex/Inmet stock. The designs are based on an industry...

RF Bulk Acoustic Wave Filters for Communications Ken-ya Hashimoto, Editor RF-BAW devices employing a piezoelectric thin membrane were proposed in 1980. Although their excellent performance was well recognized, the majority of engineers believed that their applicability was limited due to extremely tight requirements given to device fabrication. However, RF-BAW...