### Abstract

A new filter construction is proposed to realize a highly miniaturized microwave bandpass filter. An element of resonator filter is composed of a square dielectric post and a round inner conductor. Each element of resonator is located in a housing similar to a conventional combline filter; however, the length of a resonator is basically a quarter wavelength. The higher unloaded Q and a larger inter-resonator coupling were implemented through two factors: open-boundary condition on the periphery along the dielectric post and the air spacing between resonators. Five-stage Chebyshev response bandpass filters were developed at 800 MHz to have 20 approximately equals 30 MHz passband and 0. 8 approximately equals 1. 0 db insertion loss at the temperature range: minus 35 approximately equals plus 80 degree C. The volume and the weight of the filters are about 25 cm**3 and 60 g respectively.

Original language | English |
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Pages (from-to) | 209-211 |

Number of pages | 3 |

Journal | IEEE MTT-S International Microwave Symposium Digest |

Publication status | Published - 1981 Jan 1 |

Externally published | Yes |

Event | IEEE MTT S Int Microwave Symp Dig 1981 - Los Angeles, CA, USA Duration: 1981 Jun 15 → 1981 Jun 19 |

### ASJC Scopus subject areas

- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering

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## Cite this

*IEEE MTT-S International Microwave Symposium Digest*, 209-211.