Impedance converter

Abstract

This invention provides an impedance converter that achieves impedance matching using a coaxial cable. [Solution] The impedance converter 1 comprises a first coaxial terminal 10, a second coaxial terminal 20, a first coaxial cable 30, and a second coaxial cable 40. At the first end E301 of the first coaxial cable, the first central conductor 31 is connected to the first terminal central conductor 11, the second end E302 forms an open end, and the first outer conductor 33 is connected to the first terminal outer conductor 13. At the third end E401 of the second coaxial cable, the second central conductor 41 is connected to the second terminal central conductor 21 and the first outer conductor 33, and the second outer conductor 43 is connected to the second terminal outer conductor 23. At the fourth end E402, the second central conductor 41 and the second outer conductor 43 are electrically connected to form a short-circuit end. The length of the second coaxial cable and the length LEG31 of the first central conductor are based on the impedance Za connected to the first coaxial terminal and the impedance Zb connected to the second coaxial terminal.

Claims

1. First coaxial terminal and second coaxial terminal, A first coaxial cable comprising a first central conductor, a first dielectric layer, and a first outer conductor, and having a first end and a second end, A second coaxial cable comprising a second central conductor, a second dielectric layer, and a second outer conductor, and having a third end and a fourth end, Equipped with, At the first end of the first coaxial cable, the first central conductor is connected to the central conductor of the first coaxial terminal. The second end of the first coaxial cable constitutes an open end, and the first outer conductor of the second end is connected to the outer conductor of the first coaxial terminal. At the third end of the second coaxial cable, the second central conductor is connected to the central conductor of the second coaxial terminal and the first outer conductor of the first end. At the third end of the second coaxial cable, the second outer conductor is connected to the outer conductor of the second coaxial terminal. At the fourth end of the second coaxial cable, the second central conductor and the second outer conductor are electrically connected to form a short-circuit end. The length of the second coaxial cable and the length of the first central conductor are determined based on the impedance connected to the first coaxial terminal and the impedance connected to the second coaxial terminal. Impedance converter.

2. An impedance converter according to claim 1, The length of the second coaxial cable and the length of the first central conductor are determined based on the ratio of the square root of the impedance connected to the first coaxial terminal to the square root of the impedance connected to the second coaxial terminal. Impedance converter.

3. An impedance converter according to claim 1, The first outer conductor, the second outer conductor, the outer conductor of the first coaxial terminal, and the outer conductor of the second coaxial terminal are grounded. Impedance converter.

4. An impedance converter according to claim 1, The first characteristic impedance of the first coaxial cable is the same as the impedance connected to the first coaxial terminal. The second characteristic impedance of the second coaxial cable is the same as the impedance connected to the second coaxial terminal. Impedance converter.

5. An impedance converter according to claim 1, The first characteristic impedance of the first coaxial cable and the second characteristic impedance of the second coaxial cable are the same as the impedance connected to the first coaxial terminal. Impedance converter.

6. An impedance converter according to claim 1, The device comprises a housing for fixing the first coaxial terminal and the second coaxial terminal, Impedance converter.

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