Abstract
A microstrip filter with cascaded Electric coupling trisection and magnetic coupling trisection is proposed. This study aims to create transmission zeros at both the side of the passband. Optimal performance is achieved by creating variable gaps in the resonators and providing open ended tuning stubs at appropriate locations. To demonstrate the concept a filter is realized and fabricated operating at 905 MHz with a pass band of 877 to 917 MHz (5%). The inherent disadvantage of wider roll off from the conventional filter is overcome by the introduction of stubs. Measured results are compared and found to be in good agreement with simulated results.
Highlights
Filters are essential circuits to pass the wanted signal and to eliminate the unwanted signal in the frequency domain
High performance filters are very important in microwave application such as Satellite communication, Radar, Navigation
The inherent disadvantage of wider roll off from the conventional filter is overcome by the introduction of stubs in the filter configuration
Summary
Filters are essential circuits to pass the wanted signal and to eliminate the unwanted signal in the frequency domain. High performance filters are very important in microwave application such as Satellite communication, Radar, Navigation. Requirements of high performance filters are: high selectivity, low insertion loss, small size and low cost (Pozar, 2004; Liu et al, 2009; Maryam and Majid, 2011). High filter selectivity requires high order filter and more resonators (Saghlatoon and Neshati, 2012). High selectivity filters can minimize the guard band between adjacent channels which uses the spectrum more efficiently. In Hong and Lancaster (1999, 2001) and Hanna et al (2005) filters with asymmetric response are characterized. These filters suffer from poor attenuation at any one side of the passband
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
