AS218-321LF RF/IF and RFID

IIP3:	47dBm
Features:	--
Impedance:	50 Ohm
Voltage - Supply:	3V
Operating Temperature:	-40°C ~ 85°C
Package / Case:	12-WFQFN Exposed Pad
Supplier Device Package:	12-QFN (3x3)
Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
RF Type:	802.11a/b/g/WiFi, WLAN
Topology:	Reflective
Circuit:	DPDT
Frequency Range:	100MHz ~ 6GHz
Isolation:	19dB
Insertion Loss:	1.4dB
Test Frequency:	5.85GHz
P1dB:	33dBm

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RF Switches

RF switches are electrical components that are used to switch frequencies and channels in radio frequency communication systems. They are used to control the signal flow between antennas, transmitters, receivers, and other components. RF switches can be used in a wide range of applications such as electronic warfare, telecommunication, military, navigation, medical, and automotive systems.The AS218-321LF is a miniature optically-controlled reflective switch commonly used in telecommunication and radio frequency applications. It is designed to switch between two or more channels with a single electrical control signal. It consists of two parts: the optically-controlled reflective (OCR) switch and the integrated driver amplifier. The OCR switch is a passive component that contains a single reflective reflective mirror. The integrated driver amplifier is an active component that provides the voltage to control the switch.The AS218-321LF works by inputting two RF signals into the optically-controlled reflective switch. When an input signal is applied, the switch will reflect one of the RF signals depending on the state of the control voltage. When the control voltage is high (ON state), the switch will reflect the first RF signal. When the control voltage is low (OFF state), the signal will be reflected to the second RF signal.The AS218-321LF uses an integrated driver amplifier in order to provide the necessary voltage level for the OCR switch. The integrated driver amplifier consists of a pair of balancedtransistors which are connected in a common collector configuration. The amplifier also contains a DC bias voltage circuit and a low-noise amplifier.In order to operate, the AS218-321LF must be supplied with a dc voltage. The minimum voltage supplied to the switch is determined by the integrated driver amplifier, whereas the maximum voltage is determined by the OCR switch. The maximum voltage level must be lower than the recommended breakdown voltage of the switch.The AS218-321LF can be used in a wide range of applications such as base stations, satellite systems, frequency-hopping systems, and mobile radio communications. It can also be used in applications such as positioning systems, navigation systems, and communications systems.The AS218-321LF is a valuable tool for those who need a reliable and cost-effective RF switch. It provides flexibility and reliability for the wide range of applications mentioned above. It is a great choice for those who are looking for a low-cost solution for their communication and radio frequency switching needs.

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