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Microstrip stepped-impedance low-pass filters using fractal shapes, such as Koch islands and Sierpinski carpets, are proposed for the first time. Conventional stepped-impedance low-pass filters are very popular, due to their ease of implementation in either microstrip or coplanar technology. However, to achieve a low-pass filter with high stopband performance,...

Compared to traditional microstrip filters, the dual-mode patch resonator shows attractive features such as its sharp band rejection and compact size. In general, the dual-mode operation consists of two degenerate modes, which are excited by asymmetrical feed lines and some perturbation element(s) on the patch resonators. Moreover, in order...

There has recently been much research on broadband and multi-band antennas for various wireless communication systems. The IEEE has issued regulations for the wireless local area network (WLAN, 802.11a/b) since 1999. The development of WLAN has already reached maturity and has become fairly universal. The development of antennas used...

Today’s engineering environment puts diverse requirements on simulation tools, demanding large spatial dimensions in terms of the computational domain on the one hand, while incorporating small, detailed and complex structures on the other. What’s needed is to address these spatial limitations and apply more advanced simulation routines for combined...

Electromagnetic (EM) analysis software has evolved from its traditional place as a back-end verification tool to a necessity throughout the design flow. However, this role can impede the design flow if it requires designers to spend precious time performing file conversions, transfers, and other minutiae, or slow it to...

EM simulation has become increasingly important in the design and analysis of antennas, microwave circuits, scattering and photonics, etc. In addition, manufacturers, regulatory bodies and the general public share a common concern over the effects of RF radiation from cell phones, implanted medical transmitters and MRI systems on humans....

PNA-X Brochure Agilent now offers a new 32-page brochure that describes in detail the PNA-X premier-performance microwave network analyzers’ applications, measurement functions, and the latest in calibration technology. The PNA-X provides the widest range of measurement applications in a single connection with breakthrough speed, accuracy, and performance compared to...

Front-to-back Solution Agilent Technologies Inc. recently announced Advanced Design System (ADS) 2009 Update 1, a complete, front-to-back solution for monolithic microwave integrated circuit (MMIC) and RF module design. The release integrates 3-D electromagnetic (EM) analysis, wireless standards-based design verification libraries, X-parameter simulation, and statistical design and yield optimization. Advanced...

Attenuator Design Kit EMC Technology introduces a new ultra broadband, wire bondable chip attenuator kit, K-BAND-DKIT. Designed with high frequency in mind, this kit offers a complete selection of wire bondable attenuators both fixed (KFA) and temperature variable (KTVA). The products included in the kit operate effectively in the...

Instrumentation Desktop Amplifiers MITEQ’s latest offering in its instrumentation amplifier series, Models NSP2000-NVG, NSP4000-NVG and NSP4000-NFG, are now available with a frequency range from 0.1 to 40 GHz. Fixed or digitally-controlled variable gain models are available. The variable gain models offer a digital control range of up to 15...