1. Introduction The parallel-coupled microstrip line was extensively characterized in the past and has been gaining a wide application in the bandpass filter design since 1958 [1]. However, one common and critical problem of this type filter design is to seriously suffer from spurious passbands at the harmonics of the operating frequency. So far, great effort has been made to suppression of the...

Analysis of multi-conductor coupled microstrip lines with an aperture in the ground plane for the design of a broadband filter D. Packiaraj a , K.J. Vinoy b , M. Ramesh a & A.T. Kalghatgi a a Central Research Laboratory, Bharat Electronics Limited, Bangalore, 560013, India b Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore, 560012, India Version of reco...

CA91 108 We report on resistivity and chemical stability of Cr/Au bilayers deposited by sputtering on three kinds of substrates: alumina, aluminum nitride and aluminum nitride coated alumina. The insertion loss of Cr/Au microstrip lines fabricated on these three substrates was low and stable after 700 cycles in the -65°C to 125°C temperature range.

A branch-line coupler (BLC) working at two arbitrary frequencies using CRLH transmission lines (TLs) is presented. It is demonstrated that the two operating frequencies can be obtained by tuning the phase slope of the different line sections. A prototype is demonstrated using only microstrip technology.

A novel ultra wideband band (UWB) bandpass filter is developed using ground plane aperture technique for enhancement of the capacitive coupling in the parallelcoupled microstrip line (PCML). The PCML with two external lines is characterized by an equivalent J-inverter network with its susceptance and the two electrical line lengths.

An effective technique utilizing neutralization lines to increase the isolation of a compact two-element dual-frequency microstrip antenna array is proposed in this paper. Two neutralization lines connect the two elements at the edge of each radiating patch. The positions and lengths of the two neutralization lines are studied to get the best performance of element isolation. A prototype of the...

The purpose of this paper is to present a complete design and analysis of new HMIC 3.5-4.5 GHz broadband balanced amplifier modules using microstrip technology. Two different modules are designed and analyzed. Each module is implemented in a single substrate. The first module used Lange couplers as power splitters and combiners while the second used branch couplers. The components of the module...

a filtering power divider/power combiner based on half mode substrate integrated waveguide technology for high power applications is proposed. this design includes one half mode substrate integrated waveguide cavity, one matched load, and four sections of quarter-wavelength transmission lines. the high isolation between output ports is obtained by combining the half mode substrate integrated wa...