Radio frequency antenna switch
AssigneeHuawei Technologies Co., Ltd.
InventorsJinger Yang, Yusong Chi, Jinhan Fan
Life of this patent
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Abstract
A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch connected to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are connected in a stack manner; 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, where the preset number is less than or equal to the total number of the multiple 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.
Claims6
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,
- wherein the multiple transistors are connected in a stack manner,
- wherein each branch selectively couples or decouples the antenna port with the radio frequency signal port under the action of a control signal,
- wherein metal wires that do not affect an electrical connection relationship among the transistors separately cover a preset number of transistors in the multiple transistors,
- wherein coverage areas of the metal wires 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.
Dependencies are inferred from the claim text.