Patent ID: 9503081
Filing Date: 2016-11-22
CPC Classification: H03K,H04B

Claim Text:
1. A radio frequency antenna switch, comprising: an antenna port configured to receive or transmit a radio frequency signal; a radio frequency signal port 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 connected to the antenna port or the radio frequency signal port, wherein each branch in the at least one branch comprises multiple transistors, the multiple transistors are connected in a stack manner, and each branch selectively couples or decouples the antenna port with the radio frequency signal port under the action of a control signal, wherein channel width to length ratios of a preset number of transistors in the multiple transistors progressively decrease in a direction away from the antenna port, and wherein the preset number is less than or equal to the total number of the multiple transistors.