RMDA20420 查看數據表（PDF） - Raytheon Company

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RMDA20420

20-42 GHz General Purpose MMIC Amplifier

Raytheon Company 

RMDA20420

RF Components 20-42 GHz General Purpose MMIC Amplifier

ADVANCED INFORMATION

Application

Information

multiplier

operation

The RMDA20420 can be used as an even harmonic multiplier or as an odd harmonic multiplier

depending on the type of DC biasing arrangement being used. Optimum DC bias is applied to peak the

desired harmonic which falls into the 20 to 42 GHz passband. The following application information will

detail the configuration and procedure for using the RMDA20420 as an even harmonic multiplier and

as an odd harmonic multiplier. Typical measured data is provided at selected frequencies within the

passband with the RMDA20420 configured as a doubler and as a tripler.

Multiplier Operation

The Raytheon RMDA20420 is a four stage general purpose MMIC amplifier covering the 20-42 GHz

passband. The amplifier has a steep gain roll off at the band edges and the input return loss of the

amplifier is better than 10 dB from 42 GHz down to DC. Any multiplier harmonics, which fall in the

passband, will get amplified and any harmonics that fall below the passband will get suppressed.

A deliberate design feature that makes the RMDA20420 an effective multiplier is the ability to

independently bias the first stage. This feature allows freedom to determine the optimum DC bias

condition required to peak the desired harmonic and suppressing the unwanted harmonics. Optimum

DC bias conditions depend largely on factors such as fundamental frequency, desired harmonic

frequency, input power level, output power level and suppression requirements.

Test Set Up

The basic test set uses a source to provide the input signal at the desired frequency and power level.

The DUT was biased either as an even harmonic or odd harmonic operation and the output was

observed on a spectrum analyzer. The power of the harmonics was measured using the spectrum

analyzer with all the cable losses accounted. Figure 1 shows the basic test set used.

Source

RMDA20420

DUT

Figure 1. Basic test set up.

Spectrum Analyzer

www.raytheonrf.com

Specifications are based on most current or latest revision.

Revised February 6, 2003

Page 10

Raytheon RF Components

362 Lowell Street

Andover, MA 01810

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