A Novel Design of Frequency Multiplier Using Feedforward Technique and Defected Ground Structure

Abstract

A novel design of frequency multiplier using a feedforward technique and a defected ground structure (DGS) is proposed. The feedforward loop in the proposed frequency multiplier suppresses the fundamental component (fo), the dumb-bell or spiral shaped DGS diminish unwanted harmonics such as second, third, fourth. Due to the combination of the feedforward structure and the DGS, only the multiplied frequency component (2fu, 3fo, 4fo) appears at the output port and the other unwanted components are suppressed excellently. The frequency multipliers are designed at 1 GHz of fo, by the proposed technique and measured. The measured output power of 2fo, 3fo, 4fo is -2.59 dBm, -5.36 dBm, -4.57 dBm, respectively, when the input power is 0 dBm.

A q uasi‐analytic synthesis methodology for spiral defected microstrip compact bandstop filters

“…The proposed design method and the presented equations are verified and validated by the experimental fabrication. The new analysis method and the design process for spiral DMSs can be extended and generalized to other applications that use spiral DMSs beside filters, such as frequency multipliers, 25 antennas, 26,27 and microwave amplifiers 28,29 for size reduction and harmonic rejection.…”

Delay Matching Compensated CMOS Microwave Frequency Doubler

“…The most widely used method is a frequency multiplier using the nonlinearity of a transistor [2]- [3]. Due to the periodic harmonic response of a transistor, the wanted frequency components at integer multiple frequencies of the fundamental component (f o ) can be obtained.…”

Propagation delay matched CMOS 0.18 μm frequency doubler for L‐band application

“…Alternatively, high frequency signal can be obtained by multiplying the low frequency signal that has relatively high stability and low PN. Therefore, several studies have been done on the design of frequency multiplier circuit [1][2][3][4][5][6].…”

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