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      Linear RF Power Amplifier (PA) Design Theory and Principles online course – RAHRF562

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    • Page 2
    29 August

    Secondary Image and Zero IF in Heterodyne Receiver

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    Secondary Image The major problem faced while designing a dual conversion heterodyne receiver is the secondary image problem. As shown in the figure, secondary image WIM2 is an IF frequency. BFP1 does not attenuate this signal as it is in …

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    26 August

    Advantages and Disadvantages of Dual Conversion Receivers

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    Advantage and disadvantage of Dual Conversion In modern day receivers we don’t have the structures where we have lot of off-chip filters as it becomes hard to design and takes big area. To connect the LNA to mixer the bandpass …

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    24 August

    Features of Dual Conversion Receiver

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    In cascaded system the Noise Figure (NF) is important in first blocks and it is vice versa in case of IP3, where the NF of last blocks matters more. So in a dual conversion receiver the noise figure of bandpass …

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    23 August

    Dual Conversion in Heterodyne Receiver

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    Dual Conversion As discussed in the previous section, ‘Image Rejection vs Channel Selection’, there is a constant trade-off between the two. There is efficient filtering in low wIF, but the image rejection is insufficient, and in high wIF, the Image …

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    23 August

    Trade-off between Image Rejection and Channel Selection

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    Understanding the trade-off in choice of IF There is a trade-off between image rejection and channel selection receiver. So there are two options in selecting the frequency of the local oscillator, or carrier says we have two options in choosing …

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    21 August

    How to Remove the Image Signal in Heterodyne Receiver?

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    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 …

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    21 August

    Image rejection in Heterodyne Receiver

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    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; …

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    20 August

    Heterodyne Receivers and its Components

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    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 …

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    17 August

    Down Conversion in RF Receiver

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    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 …

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    17 August

    RF Receiver Architecture and Channel Selection

    • Posted by Sanchita Sarkar, Ata Sarrafinazhad, Ahsan Ghoncheh
    • Categories Blog, RF System Design of Receivers, RF Topics, Transmitters & Transceivers - RAHRF409
    • Comments 0 comment

    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 …

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