As discussed in the section ‘Image problem in the heterodyne receiver’, that image signal’s frequency is quite close to the desired band, but it is outside the band. So to remove the image signal from the desired channel, a filter …
High-side injection: We have a channel, and to do down conversion, this channel is mixed with a local oscillator. There are two options to do this: first, we choose the frequency of the local oscillator (wLO) above the desired channel; …
Heterodyne Receiver In a heterodyne receiver the received signal from an antenna is down converted from RF signal to intermediate frequency. Win is not equal to WLO. The basic structure of heterodyne receiver is shown below. There is an antenna …
Down Conversion Down conversion occurs in the receiver. Before transmitting the data, it is shifted to high frequency and is captured by the antenna and passed on to the receiver. The captured signal is then shifted from high frequency to …
An RF module is a block that has sub-blocks inside it. It is a small electronic circuit used to transmit and receive radio waves on one of a number of carrier frequencies. These carrier waves have high frequencies. RF module …