Dual band coupler
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorJi Hwan Shin
Life of this patent
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Abstract
Disclosed is a dual band coupler, in which a dielectric layer having a coupling signal line is positioned between dielectric layers having a first main signal line and a second main signal line. Coupling coefficients of first and second signal lines can be independently controlled by laminating different numbers of dielectric layers between the coupling signal line and main signal lines, respectively. A shielding pattern for excluding mutual electromagnetic interference between the first and second main signal lines is formed on the dielectric layer having the coupling signal line to improve an isolation, and a small sized-dual band coupler can be provided because the dielectric layer having a ground pattern can be omitted.
Claims12
A dual band coupler, comprising:
- a first ground pattern formed on a first dielectric layer;
- a first main signal line having a first input and a first output terminal, said first main signal line being a conductive pattern formed on a second dielectric layer laminated on the first dielectric layer;
- a coupling signal line having a coupling terminal and an isolation terminal, said coupling signal line being a conductive pattern formed on a third dielectric layer laminated on the second dielectric layer;
- a second main signal line having a second input and a second output terminal, said second main signal line being a conductive pattern formed on a fourth dielectric layer laminated on the third dielectric layer;
- and
- a second ground pattern formed on a fifth dielectric layer laminated on the fourth dielectric layer.
A dual band coupler, comprising:
- a first main signal line having a first input and a first output terminal, said first main signal line being formed on the first dielectric layer;
- a coupling signal line having a coupling output terminal and an isolation output terminal, said coupling signal line being formed on a second dielectric layer laminated on a first dielectric layer;
- a second main signal line having a second input and a second output terminal, said second main signal line being formed on a third dielectric layer laminated on the second dielectric layer;
- and
- a ground pattern formed on the second dielectric layer, being electrically separated from the coupling signal line.
Dependencies are inferred from the claim text.