Dielectric filter, dielectric duplexer, and communication...

Wave transmission lines and networks – Coupling networks – Balanced to unbalanced circuits

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C333S134000, C333S204000

Reissue Patent

active

RE040465

ABSTRACT:
A λ/2 resonator comprises an inner conductor formed hole having an inner conductor with both open-ends, formed therein, and λ/4 resonators comprise inner conductor formed holes having inner conductors with one short-circuited ends and the other open ends, respectively. The resonators are coupled, whereby a terminal electrode connected to the vicinity of the one open end of one of the λ/4 resonators functions as an unbalanced terminal, and terminal electrodes connected to both open ends of the λ/2 resonator function as balanced terminals.

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Nishide et al., Balance-to Unbalance Transformers, 1970, Monogr. res. Inst. Appl. elec., Japan, No. 18, pp. 69-85.

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