Power amplifier utilizing quadrature hybrid for power dividing, combining and impedance matching
View Patent ↗A power amplifier includes a quadrature hybrid and input impedance matching network. The power amplifier also includes at least one amplifier that includes an output electrode, and a quadrature hybrid and output impedance matching network. The quadrature hybrid and input impedance matching network exhibits a low pass frequency response.
1. A power amplifier comprising:
a quadrature hybrid and input impedance matching network;
at least one amplifier that includes an output electrode; and
a quadrature hybrid and output impedance matching network, wherein the quadrature hybrid and input impedance matching network exhibits a low pass frequency response.
2. The power amplifier of claim 1 further comprising: bias circuitry that biases the amplifier.
3. The power amplifier of claim 1 wherein the quadrature hybrid and input impedance matching network includes
a first node;
a second node;
a first branch that includes a first electrode coupled to the first node and a second electrode coupled to the second node;
a third node;
a second branch that includes a first electrode coupled to the first node and a second electrode coupled to the third node;
a fourth node;
a third branch that includes a first electrode coupled to the third node and a second electrode coupled to the fourth node; and
a fourth branch that includes a first electrode coupled to the second node and a second electrode coupled to the fourth node.
4. The power amplifier of claim 1 wherein the quadrature hybrid and output impedance matching network includes
a first node; a second node;
a first branch that includes a first electrode coupled to the first node and a second electrode coupled to the second node;
a third node;
a second branch that includes a first electrode coupled to the first node and a second electrode coupled to the third node;
a fourth node;
a third branch that includes a first electrode coupled to the third node and a second electrode coupled to the fourth node; and
a fourth branch that includes a first electrode coupled to the second node and a second electrode coupled to the fourth node.
5. The power amplifier of claim 1 wherein the quadrature hybrid and input impedance matching network is implemented with a plurality of lump elements.
6. The power amplifier of claim 1 wherein the quadrature hybrid and input impedance matching network exhibits a high pass frequency response.
7. The power amplifier of claim 1 wherein the quadrature hybrid and output impedance matching network is implemented with a plurality of lump elements.
8. The power amplifier of claim 1 wherein the quadrature hybrid and output impedance matching network exhibits a low pass frequency response.
9. The power amplifier of claim 1 wherein the quadrature hybrid and output impedance matching network exhibits a high pass frequency response.
10. The power amplifier of claim 1 wherein the power amplifier is implemented in a monolithic microwave integrated circuit (MMIC).
11. The power amplifier of claim 1 wherein the power amplifier is utilized in a code-division multiple access (CDMA) mobile handset.
12. The power amplifier of claim 1 wherein the power amplifier is utilized in a code-division multiple access (CDMA) mobile handset that employs one of Cellular mobile telephone frequencies and PCS mobile telephone frequencies.