In this paper, a miniature ultrawideband (UWB) bandpass filter with dual notch bands and wide upper stopband is presented. The ultrawide passband characteristic is achieved using a microstrip to slot line transition, and a wide upper stop band is realized using an elliptical lowpass filter. The dual band notches at 5.46 GHz and 8.04GHz are obtained by incorporating defected microstrip structure...

Microstrip filters are widely used in microwave circuit, This paper briefly describes the design principle of microstrip band stop filters. This paper presents novel millimeter wave filter structures by creation of some slots on the strip. This paper presents the design and simulation of a narrow band stop filter using microstrip which is designed to have a central frequency of 1.273 GHz which ...

The paper describes new concept o antenna for RFID technology. Antenna is locate lines to monitor tags situated on trains. Antenna w and it is fabricated by microstrip technology. Ant same mirrored parts having the same radiation p consists of three dielectric layers. The first laye radiation elements. The second layer is only construction and it sets optimal electromagnet radiating elements. T...

A novel method is proposed to synthesize dual-band bandpass filters (BPFs) from a prototype lowpass filter. By implementing successive frequency transformations and circuit conversions, a new filter topology is obtained which consists of only admittance inverters and series or shunt resonators, and is thereby easy to be realized by using conventional distributed elements. A microstrip dual-band...

This article presents an overview of the microstrip patch antenna and its design techniques. Basically a microstrip patch antenna comprises of a trace of copper or any other metal of any geometry on one side of a standard printed circuit board substrate with other side grounded. The antenna is fed using various feeding techniques like coaxial, strip line, aperture coupling or proximity coupling...

The low cost, high efficiency, single-feed microstrip antenna with a two-layer substrate for circular polarization (CP) is presented. A new CP design of a singlefeed nearly square patch with two truncated square corners is also described here. The two-layer substrate consists of an FR4 dielectric layer and a foam layer. The effects of the foam substrate on the impedance bandwidth, axial ratio, ...

Substrate integrated waveguide (SIW) is a new form of transmission line. It facilitates the realization of nonplanar (waveguide based) circuits into planar form for easy integration with other planar (microstrip) circuits and systems. This paper describes the design of an SIW to microstrip transition. The transition is broadband covering the frequency range of 8 – 12GHz. The measured in-band in...

─ A novel ultra-wideband (UWB) out-ofphase four-way power divider is presented. To achieve a division over a large frequency range, Tjunctions formed by slotlines and microstrip lines are utilized. Based on the transmission-line equivalent-circuit method, we derive the design equations of the proposed power divider. Furthermore, all measured results are in good agreement with the predicted desi...

Advanced numerical linear circuit models for parallel microstrip coupled line sections have been developed by Applied Wave Research (AWR) for use with their Microwave Office simulation program. The linear elements incorporate closedform solution techniques that may be evaluated with a linear circuit simulator. The response of the elements provides a high degree of accuracy with respect to elect...