Dielectric filter, dielectric antenna shared device and communication device

Abstract

The present invention discloses a dielectric filter, a dielectric antenna duplexer, and a communication device. On a substantially rectangular dielectric block, inner conductor forming holes 2a-2c for forming inner conductors 3a-3c on the inner surface and electrodes including inner surface electrodes are provided. Vibration holes 9, 10 form an outer conductor 4 outside them. The non-outer conductor forming parts 7, 8 are formed from the opening faces of the excitation holes 9, 10 to the mounting surface, and the input and output electrodes 5, 6 are formed, and are conducted with the electrodes on the inner surfaces of the excitation holes 9, 10. Short-circuit the other end of the excitation hole with the outer conductor 4. By providing the non-electrode forming portions 13 and 14 on the short-circuit surface, the ground current flowing from the electrodes on the inner surfaces of the excitation holes 9 and 10 to the outer conductor 4 on the mounting surface side of the dielectric block 1 is controlled. A dielectric filter that can reduce spurious modes other than the TEM oscillation mode, has excellent spurious characteristics, and is simple in structure is formed.

Description

technical field [0001] The present invention relates to an integrated dielectric filter using a dielectric block, a dielectric antenna duplexer, and a communication device equipped with the aforementioned devices, which are mounted on equipment such as mobile communications. Background technique [0002] For the configuration of conventional dielectric filters, refer to Figure 8 be explained. [0003] Figure 8 (a) is a front view of the short-circuit surface of the conductor of the dielectric filter, (b) is a bottom view of the dielectric filter, and (c) is a front view of the open surface of the inner conductor of the dielectric filter. [0004] exist Figure 8 Among them, 1 is a dielectric block, 2a-2c are inner conductor forming holes, 3a-3c are inner conductors, 33a-33c are non-inner conductor forming parts, 4 is outer conductors, 5 and 6 are input and output electrodes, 7 and 8 are The non-outer conductor forming parts 9 and 10 are excitation holes for forming electr...

AI Technical Summary

Problems solved by technology

As a result, the attenuation and parasitic characteristics in the vicinity of the dielectric filter are extremely deteriorated

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