Broadband and low-noise radio frequency amplifier of satellite navigation aviation enhancing system and transmission device
An enhancement system and satellite navigation technology, which is applied in the field of satellite navigation system aviation enhancement, can solve problems such as harsh working environment, inconvenient maintenance of reference receivers, and affecting equipment stability, and achieve good flatness, ability to suppress electromagnetic interference, and loss small effect
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Embodiment 1
[0034] A radio frequency signal amplifier of a satellite navigation aviation enhancement system, comprising a cascaded first-stage amplifying circuit, a second-stage amplifying circuit, a first-stage inter-stage matching circuit, a band-pass filter, a second-stage inter-stage matching circuit and a third-stage amplifying circuit.
[0035]The first-stage amplifying circuit is composed of an input matching circuit, an amplifier and an output matching circuit; the input matching circuit is composed of capacitors C1-C6, resistors R1-R2, and inductor L1; one end of the resistor R2 is connected to a +5v power supply, and its The other end is grounded through the resistor R1 and the capacitor C4 in turn; one end of the capacitor C6 is connected to the node between the resistors R1 and R2, and the other end is grounded; one end of the capacitor C5 is connected to the resistor R1 and the capacitor C4 The node between them, the other end of which is grounded; one end of the inductance L...
Embodiment 2
[0045] A satellite navigation aviation enhancement system broadband low-noise radio frequency signal transmission device is composed of cascaded radio frequency signal amplifiers, optical transmitting modules, optical fibers and optical receiving modules; the radio frequency signal amplifier is the broadband satellite navigation aviation enhancement system described in Embodiment 1 low-noise RF amplifiers, such as figure 2 shown.
[0046] The radio frequency signal RFin sent by the satellite navigation antenna is sent to the satellite navigation broadband radio frequency signal amplifier, and the circuit output terminal RFout is connected to the optical transmitting module to convert the radio frequency signal into an optical signal. After optical fiber transmission, the optical signal is transmitted by the optical receiving module. Convert it into an electrical signal C, send it out through the SMA interface, and use it for the reference receiver. The model of the optical f...
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