In this paper,the finite-difference time-domain(FDTD)algorithm is employed to simulate microwave pulse coupling into the dielectric slot on a rectangular cavity.We investigate the factors that influence the coupling r...In this paper,the finite-difference time-domain(FDTD)algorithm is employed to simulate microwave pulse coupling into the dielectric slot on a rectangular cavity.We investigate the factors that influence the coupling resonant peak and resonant frequency of the dielectric slot,including the slot length,slot width,and relative dielectric constant. Numerical results show that the equation of resonant frequency for microwave coupling into the dielectric slot is modified. Finally,the resonant condition of rectangular cavity with a dielectric slot is provided.展开更多
This paper presents state-of-the-art high Q single-mode dielectric resonator （DR） cavity filters for PCS wireless base stations. DR cavity filters shrink the cavity size significantly more than waveguide cavity filt...This paper presents state-of-the-art high Q single-mode dielectric resonator （DR） cavity filters for PCS wireless base stations. DR cavity filters shrink the cavity size significantly more than waveguide cavity filters and offer about twice higher Q than coaxial resonators. Thus, they have important applications in wireless base stations operating below 2.5 GHz. Dual-mode and triple-mode DR cavity filters have existed for a while; however, single-mode DR cavity filters are predominant because they are cheaper to manufacture. This paper summarizes the main characteristics of TE01 mode DR cavities, including mode chart and field distribution, and compares cavity Q with waveguide and combline （coaxial） cavities. Dielectric combline and TM010 mode DR cavities are analyzed and compared to TE01 mode DR cavities. General filter design techniques are discussed, and several design examples are given to show how filter technology has developed.展开更多
文摘In this paper,the finite-difference time-domain(FDTD)algorithm is employed to simulate microwave pulse coupling into the dielectric slot on a rectangular cavity.We investigate the factors that influence the coupling resonant peak and resonant frequency of the dielectric slot,including the slot length,slot width,and relative dielectric constant. Numerical results show that the equation of resonant frequency for microwave coupling into the dielectric slot is modified. Finally,the resonant condition of rectangular cavity with a dielectric slot is provided.
文摘This paper presents state-of-the-art high Q single-mode dielectric resonator （DR） cavity filters for PCS wireless base stations. DR cavity filters shrink the cavity size significantly more than waveguide cavity filters and offer about twice higher Q than coaxial resonators. Thus, they have important applications in wireless base stations operating below 2.5 GHz. Dual-mode and triple-mode DR cavity filters have existed for a while; however, single-mode DR cavity filters are predominant because they are cheaper to manufacture. This paper summarizes the main characteristics of TE01 mode DR cavities, including mode chart and field distribution, and compares cavity Q with waveguide and combline （coaxial） cavities. Dielectric combline and TM010 mode DR cavities are analyzed and compared to TE01 mode DR cavities. General filter design techniques are discussed, and several design examples are given to show how filter technology has developed.
