CMOS Based RF Antenna Switch
First Claim
1. A semiconductor antenna switch, comprising:
- a first antenna port for coupling to a first antenna;
a second antenna port for coupling to a second antenna;
a transmit/receive port for coupling to either said first antenna or said second antenna;
a matching network coupled to said transmit/receive port;
a first switch coupled in series between said first antenna port and said matching network; and
a second switch coupled in series between said second antenna port and said matching network.
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Accused Products
Abstract
A novel and useful radio frequency (RF) front end module (FEM) circuit that provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 WLAN, 3G and 4G cellular standards, Bluetooth, ZigBee, etc. The configuration of the FEM circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes. The FEM circuit includes a power amplifier made up of one or more sub-amplifiers having high and low power circuits and whose outputs are combined to yield the total desired power gain. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provide efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers.
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Citations
21 Claims
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1. A semiconductor antenna switch, comprising:
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a first antenna port for coupling to a first antenna; a second antenna port for coupling to a second antenna; a transmit/receive port for coupling to either said first antenna or said second antenna; a matching network coupled to said transmit/receive port; a first switch coupled in series between said first antenna port and said matching network; and a second switch coupled in series between said second antenna port and said matching network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor antenna switch, comprising:
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a first antenna port for coupling to a first antenna; a second antenna port for coupling to a second antenna; a transmit/receive port for coupling a transmit RF signal to and a receive RF signal from either said first antenna or said second antenna; a first field effect transistor (FET) switch having source, drain and gate terminals, the drain terminal coupled to said first antenna port, the source coupled to said transmit/receive port, the gate terminal operative to receive a first enable signal for controlling said first FET switch; and a second field effect transistor (FET) switch having source, drain and gate terminals, the drain terminal coupled to said second antenna port, the source coupled to said transmit/receive port, the gate terminal operative to receive a second enable signal for controlling said second FET switch. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification