The L & C's are generic placeholders for matching components, whose types and values depend on the application -- frequency, gain, noise figure, and input level capacity. Assuming the source impedance is 50 ohm, you can choose to simply terminate the device's input with a 50 ohm resistor to ground (i.e., use a resistor in place of L1), and use C1 & C2 as DC block capacitors.

Alternatively, if high sensitivity (high gain) over a narrow frequency range is desired, then you can use the L-C network to match the 50 ohm source to the device's input impedance (equivalent R & shunt C values vs. frequency are shown on TPC 15 on the datasheet (p. 6). There are a number of tools on the web for calculating the needed component values. E.g.,

Hi, Peng,

The L & C's are generic placeholders for matching components, whose types and values depend on the application -- frequency, gain, noise figure, and input level capacity. Assuming the source impedance is 50 ohm, you can choose to simply terminate the device's input with a 50 ohm resistor to ground (i.e., use a resistor in place of L1), and use C1 & C2 as DC block capacitors.

Alternatively, if high sensitivity (high gain) over a narrow frequency range is desired, then you can use the L-C network to match the 50 ohm source to the device's input impedance (equivalent R & shunt C values vs. frequency are shown on TPC 15 on the datasheet (p. 6). There are a number of tools on the web for calculating the needed component values. E.g.,

Impedance Matching Network Designer

L-Match | Electronics and Electrical Engineering Tools | EEWeb Community

The attached example shows calculated L-C values for a high-pass and a low-pass matching network for a 50 ohm source at 150 MHz.

Benjamin