This thesis presents the Hybrid Realization of RF(Radio Frequency) Receiver for GPS(Global Positioning System). The realized receiver includes 1540MHz PLL(Phase Locked Loop) and frequency down converter. The frequency down converter consists of LNA(Low Noise Amplifier), mixer, dielectric filter for RF(Radio Frequency), and SAW(Surface Acoustic Waves) for IF(Intermediate Frequency). A 1575.42 MHz RF signal from an artificial satellite is mixed with a 1540MHz LO(Local Oscillator) made from PLL. Then, SAW , which is 1.9MHz bandwidth, selects the difference frequency, 35.42MHz, of the two frequencies. The frequency conversion gain of this down converter is 17dB, and the loss of SAW is 16dB. The PLL generating LO, 1540MHz, consists of the 10MHz TCXO(Temperature Compensated X-tal Oscillator), dual modulus prescaler 32/33, frequency divider 14, frequency divider 3, PFD(Phase Frequency Detector), LPF(Low Pass Filter), and VCO(Voltage Controlled Oscillator). The two input signal frequencies of PFD are 3.33MHz. The one is the output of VCO, 1540MHz, divided by 462. The other is the output of TCXO, 10MHz, divided by 3. The output of PFD is filtered by LPF. The low frequency output of LPF supplies to VCO. Subsequently, the 1540MHz PLL is completed.
The total current is 47mA and the supply voltage is 5[v]. This proposed RF receiver works well with reasonable power
