Power divider/combiner

Patent metadata

Field	Value
Publication number	US-10930995-B2
Application number	US-201716088270-A
Country	US
Kind code	B2
Filing date	Feb 2, 2017
Priority date	Jun 3, 2016
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

Provided is a power divider/combiner capable of improving reflection characteristics and isolation characteristics. The power divider/combiner is formed by a multilayer board, and a strip conductor is arranged in an inner layer of the multilayer board and a chip resistor is arranged on an outer surface of the multilayer board. The power divider/combiner includes vias, which connect the strip conductor and the chip resistor, and includes stubs mounted between input/output terminals and the vias. With this configuration, it is possible to adjust induction mainly during an odd mode of an even/odd mode operation and to consequently improve reflection characteristics of the input/output terminals and isolation characteristics between the input/output terminals.

First claim

The invention claimed is:

1. A power divider/combiner, comprising:
a common terminal configured to receive input of a high frequency signal to be divided, or output a combined high frequency signal;
a first input/output terminal and a second input/output terminal, which are configured to output a divided high frequency signal or receive input of a high frequency signal to be combined;
a first quarter-wave impedance transformer including one end connected to the common terminal and another end connected to the first input/output terminal;
a second quarter-wave impedance transformer including one end connected to the common terminal and another end connected to the second input/output terminal;
an isolation resistor configured to prevent an interference between a high frequency signal of the first input/output terminal and a high frequency signal of the second input/output terminal;
a first line configured to connect the isolation resistor and the first input/output terminal, and having a length that is an integer multiple of half a wavelength; and
a second line configured to connect the isolation resistor and the second input/output terminal, and having a length that is an integer multiple of half a wavelength,
wherein at least two or more of line portions of the first line and the second line have different impedances and are connected in cascade,
wherein the first line includes a first stub at a line portion located at a center in a longitudinal direction of the first line or on a side closer to the first input/output terminal than the center, and
wherein the second line includes a second stub at a line portion located at a center in a longitudinal direction of the second line or on a side closer to the second input/output terminal than the center.

2. The power divider/combiner according to claim 1 , further comprising a third stub provided between the first quarter-wave impedance transformer and the second quarter-wave impedance transformer.

3. The power divider/combiner according to claim 1 , comprising a multilayer board including:
a strip conductor of the multilayer board inner layer forming each of the terminals, the transformers, the lines, and the stubs;
a chip resistor forming the isolation resistor and mounted on an outer surface of the multilayer board; and
a vertical connection conductor configured to connect the strip conductor and the chip resistor.

4. The power divider/combiner according to claim 3 , further comprising a ground vertical conductor provided around the vertical connection conductor.

5. The power divider/combiner according to claim 1 , comprising a multilayer board including:
a strip conductor of the multilayer board inner layer forming each of the terminals, the transformers, the lines, and the stubs;
a chip resistor forming the isolation resistor and mounted on the multilayer board inner layer; and
a vertical connection conductor configured to connect the strip conductor and the chip resistor.

6. The power divider/combiner according to claim 5 , further comprising a ground vertical conductor provided around the vertical connection conductor.

7. The power divider/combiner according to claim 1 , wherein the first line and the second line have lengths that are each an odd multiple of half a wavelength.

8. The power divider/combiner according to claim 1 , wherein the first line and the second line have lengths that are each an even multiple of half a wavelength.

9. The power divider/combiner according to claim 1 ,
wherein the first line includes a fourth stub at a line portion between the first stub and the first input/output terminal side, and
wherein the second line includes a fifth stub at a line portion between the second stub and the side of the second input/output terminal side.

10. A power divider/combiner, comprising:
a common terminal configured to receive input of a high frequency signal to be divided, or output a combined high frequency signal;
a first input/output terminal and a second input/output terminal, which are configured to output a divided high frequency signal or receive input of a high frequency signal to be combined;
a quarter-wave impedance transformer including one end connected to the common terminal;
a first quarter-wave line including one end connected to the quarter-wave impedance transformer, and another end connected to the first input/output terminal;
a second quarter-wave line including one end connected to the quarter-wave impedance transformer, and another end connected to the second input/output terminal;
an isolation resistor configured to prevent an interference between a high frequency signal of the first input/output terminal and a high frequency signal of the second input/output terminal;
a first line configured to connect the isolation resistor and the first input/output terminal, and having a length that is an integer multiple of half a wavelength; and
a second line configured to connect the isolation resistor and the second input/output terminal, and having a length that is an integer multiple of half a wavelength,
wherein at least two or more of line portions of the first line and the second line have different impedances and are connected in cascade,
wherein the first line includes a first stub at a line portion located at a center in a longitudinal direction of the first line or on a side closer to the first input/output terminal than the center, and
wherein the second line includes a second stub at a line portion located at a center in a longitudinal direction of the second line or on a side closer to the second input/output terminal than the center.

11. The power divider/combiner according to claim 10 , further comprising a third stub provided between the first quarter-wave line and the second quarter-wave line.

12. The power divider/combiner according to claim 10 , comprising a multilayer board including:
a strip conductor of the multilayer board inner layer forming each of the terminals, the transformers, the lines, and the stubs;
a chip resistor forming the isolation resistor and mounted on an outer surface of the multilayer board; and
a vertical connection conductor configured to connect the strip conductor and the chip resistor.

13. The power divider/combiner according to claim 12 , further comprising a ground vertical conductor provided around the vertical connection conductor.

14. The power divider/combiner according to claim 10 , comprising a multilayer board including:
a strip conductor of the multilayer board inner layer forming each of the terminals, the transformers, the lines, and the stubs;
a chip resistor forming the isolation resistor and mounted on the multilayer board inner layer; and
a vertical connection conductor configured to connect the strip conductor and the chip resistor.

15. The power divider/combiner according to claim 14 , further comprising a ground vertical conductor provided around the vertical connection conductor.

16. The power divider/combiner according to claim 10 , wherein the first line and the second line have lengths that are each an odd multiple of half a wavelength.

17. The power divider/combiner according to claim 10 , wherein the first line and the second line have lengths that are each an even multiple of half a wavelength.

18. The power divider/combiner according to claim 10 ,
wherein the first line includes a fourth stub at a line portion between the first stub and the first input/output terminal side, and
wherein the second line includes a fifth stub at a line portion between the secon

Assignees

• Mitsubishi Electric Corp

Inventors

• Yoshioka Hideharu
• Hirota Akimichi
• Yoneda Naofumi
• Ishibashi Hidenori

Classifications

• H01P5/19 Primary

  of the junction type · CPC title

• H01P1/32

  Non-reciprocal transmission devices (H01P1/02 - H01P1/30 take precedence) · CPC title

• H01P5/16 Primary

  Conjugate devices, i.e. devices having at least one port decoupled from one other port · CPC title