Radio frequency antenna switch
First Claim
1. A radio frequency antenna switch, comprising:
- an antenna port configured to either receive or transmit a radio frequency signal;
a radio frequency signal port coupled to the antenna port and configured to receive the radio frequency signal from the antenna port, or send the radio frequency signal to the antenna port; and
at least one branch coupled between the antenna port and the radio frequency signal port, wherein each branch comprises a plurality of transistors, wherein the transistors are coupled in a stack manner, wherein each branch selectively couples and decouples the antenna port with the radio frequency signal port, wherein channel width to length ratios of a preset number of transistors in the transistors progressively decrease in a direction away from the antenna port, and wherein the preset number is less than or equal to a total number of the transistors.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch coupled to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are coupled in a stack manner, channel width to length ratios of a preset number of transistors in the transistors progressively decrease in a direction away from the antenna port, where the preset number is less than or equal to the total number of the transistors. With the radio frequency antenna switch, capacitances of the preset number of transistors close to the antenna port increase, and distributed voltages that these transistors close to an antenna end in an off state need to bear are reduced.
-
Citations
20 Claims
-
1. A radio frequency antenna switch, comprising:
-
an antenna port configured to either receive or transmit a radio frequency signal; a radio frequency signal port coupled to the antenna port and configured to receive the radio frequency signal from the antenna port, or send the radio frequency signal to the antenna port; and at least one branch coupled between the antenna port and the radio frequency signal port, wherein each branch comprises a plurality of transistors, wherein the transistors are coupled in a stack manner, wherein each branch selectively couples and decouples the antenna port with the radio frequency signal port, wherein channel width to length ratios of a preset number of transistors in the transistors progressively decrease in a direction away from the antenna port, and wherein the preset number is less than or equal to a total number of the transistors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A system, comprising:
-
an amplifier; and a radio frequency antenna switch coupled to the amplifier, wherein the radio frequency antenna switch comprises; an antenna port configured to either receive or transmit a radio frequency signal; a radio frequency signal port coupled to the amplifier and configured to receive the radio frequency signal from the antenna port, or send the radio frequency signal to the antenna port; and at least one branch coupled between the antenna port and the radio frequency signal port, wherein each branch comprises a plurality of transistors, wherein the transistors are coupled in a stack manner, wherein each branch selectively couples and decouples the antenna port with the radio frequency signal port, wherein channel width to length ratios of a preset number of transistors in the transistors progressively decrease in a direction away from the antenna port, and wherein the preset number is less than or equal to a total number of the transistors. - View Dependent Claims (17, 18, 19, 20)
-
Specification