Abstract
This paper describes the development of 4-Pole Chebyshev and Quasi-Elliptic Ka Band Dielectric Resonator Filter using Higher Order Mode TE01δ+1. A microwave filter is a two port network used to control the frequency response at a certain point in a microwave system by providing transmission at frequencies within the passband of the filter and attenuation in the stop-band of the filter. The satellite communication industry created demand for low-mass narrow-band low-loss filters with severe specification on amplitude selectivity and phase linearity. The microwave region of the electromagnetic spectrum has certain unique properties. This enable microwave signals to propagate over long distances through the atmosphere under all the most severe weather conditions. These have both military and civilian applications, including Radar, Navigation and Wireless Communication. Microwave Filters are vital components in a huge variety of electronic systems, including cellular radio, satellite communications and radar. The design of filters uses network synthesis, with which it is possible to apply systematic procedures to work forward from specification to a final theoretical design.
Highlights
AS the Federal Communications Commission (FCC) tightens the frequency allocation bands for satellite communication services providers, the need for “brick wall” filters becomes increasingly large
In cases where a very sharp roll off is required, transmission zeros are introduced with the use of non-adjacent resonator couplings
In modern day filter design, for narrow bandwidth band-pass filters; this is often implemented with a dielectric resonator filter with crosscouplings
Summary
AS the Federal Communications Commission (FCC) tightens the frequency allocation bands for satellite communication services providers, the need for “brick wall” filters becomes increasingly large. To sufficiently attenuate Provider B’s pass band frequencies while aiming to preserve Provider A’s pass band frequencies with minimum loss, a high quality factor filter is needed. Dielectric resonator filters have been used widely in mobile communication systems, radar and satellite due to their high Q, compact size and temperature stability [1] They offer high selectivity in narrow bandwidth applications with low insertion loss. The perfect filter would have zero insertion loss in the pass-band, infinite attenuation in the stop band, and a linear phase response (to avoid signal distortions) in the pass-band. The insertion loss method allows a high degree of control over the pass-band and stop-band amplitude and phase characteristics, with a systematic way to synthesize a desired response.
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