3/28/2023 0 Comments Signal path from mixer to monitors![]() ![]() The first voltage-controlled oscillator 120 receives the initial signal from the first filter 110 and outputs an output signal, and the output signal has an oscillation frequency ω out. For the reason that the first filter 110 is a band pass filter, the first filter 110 filters unnecessary low frequency and high frequency noises of the radio frequency signal S R(t) and outputs an initial signal. The first filter 110 receives the radio frequency signal S R(t) from the antenna A. 1 again, the antenna A is configured to receive a radio frequency signal S R(t), wherein the radio frequency signal S R(t) includes an envelope component and a frequency modulated component (or phase modulated component). 1, a polar receiver using injection-locking technique 100 in accordance with a preferred embodiment of the present invention includes an antenna A, a first filter 110 electrically connected with the antenna A, a first voltage-controlled oscillator 120 electrically connected with the first filter 110, a first mixer 130 electrically connected with the first filter 110 and the first voltage-controlled oscillator 120, a frequency discriminator 140 electrically connected with the first voltage-controlled oscillator 120, a second filter 150 electrically connected with the first mixer 130, a third filter 160 electrically connected with the frequency discriminator 140, a first analog-digital converter 170 electrically connected with the second filter 150, a second analog-digital converter 180 electrically connected with the third filter 160, and a digital signal processing unit 190 electrically connected with the first analog-digital converter 170 and the second analog-digital converter 180. Owing to simplicity, low cost and high energy efficiency of the present invention, the proposed polar receiver has great potential in applications for green radio. The envelope component and the frequency-modulated component can be digitally processed by the digital signal processing unit so as to accomplish radio frequency signal demodulation. The polar receiver further combines the injection-locking function of the first voltage-controlled oscillator with the frequency discriminator and the third filter to separate a frequency-modulated component from a radio frequency signal received from the antenna. In this invention, the polar receiver using injection-locking technique combines the injection-locking function of the first voltage-controlled oscillator with the first mixer and the second filter to separate an envelope component from a radio frequency signal received from the antenna. ![]() The primary object of the present invention is to provide a polar receiver using injection-locking technique including an antenna, a first filter electrically connected with the antenna, a first voltage-controlled oscillator electrically connected with the first filter, a first mixer electrically connected with the first filter and the first voltage-controlled oscillator, a frequency discriminator electrically connected with the first voltage-controlled oscillator, a second filter electrically connected with the first mixer, a third filter electrically connected with the frequency discriminator, a first analog-digital converter electrically connected with the second filter, a second analog-digital converter electrically connected with the third filter, and a digital signal processing unit electrically connected with the first analog-digital converter and the second analog-digital converter. ![]()
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