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High fundamental rejection transformer based mm-wave odd frequency multiplier.

IP.com Disclosure Number: IPCOM000236318D
Publication Date: 2014-Apr-20
Document File: 4 page(s) / 103K

Publishing Venue

The IP.com Prior Art Database

Abstract

Frequency multipliers and among them frequency triplers are a basic building block in RFICs, such as radio transceiver (for communication), imaging or RADAR. Typically, single stage frequency multipliers are frequency doublers which utilize natural differential input to single ended output topology for fundamental rejection, frequency by 3 multipliers (triplers) have no natural way to reject the fundamental frequency. In order to create a large fundamental rejection, filter stages are added. This will require an increase in chip area, and power consumption. The problem may aggravate since increasing the number of stages, will reduce the design robustness to temperature, supply voltage and process variation. This novel design includes a compact structure with high fundamental rejection, impedance match, DC supply and a balun for the multiplier. Design of a single stage saves chip area, power, and have lower constraints on the design.

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High fundamental rejection transformer based mm -

-wave odd frequency multiplier

wave odd frequency multiplier .

    Frequency multipliers and among them frequency triplers are a basic building block in RFICs, such as radio transceiver (for communication), imaging or RADAR.

    Typically, single stage frequency multipliers are frequency doublers which utilize natural differential input to single ended output topology for fundamental rejection, frequency by 3 multipliers (triplers) have no natural way to reject the fundamental frequency.

In order to create a large fundamental rejection, filter stages are added.

This will require an increase in chip area, and power consumption.

The problem may aggravate since increasing the number of stages, will reduce

the design robustness to temperature, supply voltage and process variation.

    This novel design of all in one sharp rejection, output match and center tap for DC supply of frequency triplers addresses some of the issues and drawbacks of other odd frequency multipliers which have no natural rejection and can be used within an even multiplier as an extra rejection technique.

    This frequency tripler design uses a balanced topology to increase odd signals and reject even ones, their by output match can be done using a transformer with a central tap for the DC supply, a transformer is used at the output which reflects a series inductance adding a series capacitor acts as a strong band pass filter tuned to the 3rd

harmonic.

    This topology provides a basis for a differential or single ended output while the transformer's secondary coil is unbound to the location of the primary's RF ground location.

    This design which employs a single tripler stage (compact) with high harmonic rejection, saves chip area, power, and have lower constraints on the design.

Prior art:

Cascading odd frequency multiplying stages, matching networks, and a band pass filters as different stages which consumes larger area.

Improvements over prior art:

Novel design that includes a compact structure with high fundamental rejection, impedance match, DC supply and a balun for the multiplier.

Design of a single stage saves chi...