Patent ID: 11949024
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A solid-state phase shifter, comprising:
a plurality of semiconductor switch devices on a plurality of branches, wherein at least one of the semiconductor switch devices is disposed on each branch, and a phase difference is generated between radio frequency signals transmitted on the plurality of branches by turning on or off semiconductor switch devices;
wherein each semiconductor switch device comprises a second semiconductor layer, a first intrinsic layer, a first semiconductor layer, a second intrinsic layer, and a third semiconductor layer stacked in a sandwich structure, wherein the first intrinsic layer and the second intrinsic layer have a same thickness, and are made from materials that have a same doping concentration coefficient;
the first intrinsic layer is located between the second semiconductor layer and the first semiconductor layer, and the second semiconductor layer, the first intrinsic layer, and the first semiconductor layer form a first PIN diode;
the second intrinsic layer is located between the third semiconductor layer and the first semiconductor layer, and the third semiconductor layer, the second intrinsic layer, and the first semiconductor layer form a second PIN diode;
the first PIN diode and the second PIN diode are axisymmetrically disposed; and
the first semiconductor layer is an N+ semiconductor layer, and the second semiconductor layer and the third semiconductor layer are P+ semiconductor layers, or
the first semiconductor layer is a P+ semiconductor layer, and the second semiconductor layer and the third semiconductor layer are N+ semiconductor layers.