Tunable impedance matching circuit
First Claim
1. A tunable impedance matching circuit, comprising:
- a first terminal coupled to a signal source;
a second terminal coupled to an antenna, wherein the tunable impedance matching circuit is adapted for matching the signal source with an impedance of the antenna;
a series path coupled between the first terminal and the second terminal and comprising a first tunable capacitor and at least one tunable inductor; and
a first shunt path coupled between the first terminal and a ground end and comprising a second tunable capacitor;
a second shunt path coupled between the second terminal and the ground end and comprising a third tunable capacitor, wherein the second tunable capacitor is different from the third tunable capacitor, wherein one of the tunable inductors comprises;
a third terminal connecting in series to the first terminal, the second terminal, the first tunable capacitor, or the rest of the tunable inductors;
a fourth terminal connecting in series to the first terminal, the second terminal, the first tunable capacitor, or the rest of the tunable inductors;
a first inductor coupled between the third terminal and the fourth terminal;
a second inductor connecting in parallel to the first inductor;
a first diode coupled between the third terminal and the second inductor; and
a second diode coupled between the fourth terminal and the second inductor, wherein the first diode and the second diode are turned on or off according to a first control signal applied to the first diode and the second diode.
1 Assignment
0 Petitions
Accused Products
Abstract
A tunable impedance matching circuit is provided for matching a signal source to an impedance of an antenna. The tunable impedance matching circuit includes two terminals, a series path, and two shunt paths. The first terminal is coupled to the signal source, and the second terminal is coupled to the antenna. The series path is coupled between the first terminal and the second terminal and includes a first tunable capacitor and at least one tunable inductor. One of the two shunt paths is coupled between the first terminal and a ground end, and the other one of the two shunt paths is coupled between the second terminal and the ground end. Each of the shunt paths includes a second tunable capacitor.
8 Citations
9 Claims
-
1. A tunable impedance matching circuit, comprising:
-
a first terminal coupled to a signal source; a second terminal coupled to an antenna, wherein the tunable impedance matching circuit is adapted for matching the signal source with an impedance of the antenna; a series path coupled between the first terminal and the second terminal and comprising a first tunable capacitor and at least one tunable inductor; and a first shunt path coupled between the first terminal and a ground end and comprising a second tunable capacitor; a second shunt path coupled between the second terminal and the ground end and comprising a third tunable capacitor, wherein the second tunable capacitor is different from the third tunable capacitor, wherein one of the tunable inductors comprises; a third terminal connecting in series to the first terminal, the second terminal, the first tunable capacitor, or the rest of the tunable inductors; a fourth terminal connecting in series to the first terminal, the second terminal, the first tunable capacitor, or the rest of the tunable inductors; a first inductor coupled between the third terminal and the fourth terminal; a second inductor connecting in parallel to the first inductor; a first diode coupled between the third terminal and the second inductor; and a second diode coupled between the fourth terminal and the second inductor, wherein the first diode and the second diode are turned on or off according to a first control signal applied to the first diode and the second diode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification