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IMP-2 Series
IMAGE REJECT MIXERS
10 to 3000 MHz / Image Rejection up to 30 dB / Internal Summing Quadrature / Hi-Rel Package
IMAGE REJECTION IMAGE REJECTION
50 for a given Amplitude and Phase Balance 45
PRINCIPAL SPECIFICATIONS
Model LO Center Bandwidth Outline Number Freq., fo, MHz MHz Style
IMP-2S-***/ 10 - 1000 IMP-2U-***/ 1000 - 3000 10% of fo 10% of fo S U
Model Numbering Note
40
35
A complete model number shall be assigned upon establishment of a full performance specification by the factory in conjunction with the customer. The model number shall include an indicator of the center frequency (f0) and a special slash number to distinguish it from related units. The format of model numbers is as above where *** = f0.
Ampl. Balance 0 dB 0.25 0.5
Image Rejection Ratio 30
GENERAL SPECIFICATIONS
(when used as a Down Converter)
25
0.75 1.0
20
2.0
15 0 0.5 1 1.5 2 2.5 3
Phase Error (degrees)
RF/LO Input Characteristics Impedance: 50 nom. VSWR: 1.5:1 max. RF Power Level: 0 dBm nom. LO Power Level: +10 dBm nom. IF Bandwidth: up to an octave RF Bandwidth: up to an octave LO Bandwidth: 10% Output Characteristics Conversion Loss: 9 dB max. Image Rejection: 25 dB min. Operating Temp: -- 55 to +85C
(For bandwidth as above)
General Notes: 1. Image Rejection Mixers are integrated networks composed of an in-phase power divider, two double balanced mixers and two 90 quadrature hybrids. Their principal function is the separation of two signals closely spaced in the frequency domain in, for example, a receiver's IF stage. 2. An image is a spurious signal occurring in a receiver's IF stage together with the real signal. Both result from the mixing process. Normally, a passband filter selects the real signal while rejecting the image. However, when the frequency difference between the real and image signals is relatively small, conventional bandpass filters are generally inadequate. 3. In an Image Reject Mixer, the image is separated from the real signal by vector subtraction. The resulting attenuation of the image is usually expressed as the ``Image Rejection Ratio'' in dB. (See graph). 4. Several factors affect attainable image rejection. For example, image rejection is a function of bandwidth, the phase and amplitude balances of the individual components chosen, mixer sensitivity and VSWR interaction among other factors. The graph allows estimating attainable image rejection under the variables of phase error and amplitude imbalance. 5. Merrimac offers a wide range of Image Reject Mixers for numerous applications. All units are designed and built in accord with applicable specifications. Designers are invited to work closely with Merrimac engineers to insure best results. 6. All Merrimac Image Reject Mixers comply with applicable sections of MIL-M-28837 and may be supplied screened for compliance with additional specifications for military and space applications requiring the highest reliability.
23Feb96
F rf t e if r to c n a tM ERRI AC /41 Faifel Pl,W estCal el,NJ,07006 / 973o ur h r n o ma in o t c M ri d . dw l 5751300 /FAX 973- 0531 575-
IMP-2 Series
IMAGE REJECT MIXERS
10 to 3000 MHz / Image Rejection up to 30 dB / Internal Summing Quadrature / Hi-Rel Package
S-Package Outline
NOTES: 1. Tolerance on 3 place decimals .010(.25) except as noted. 2. Dimensions in inches over millimeters. 3. Lead Dimensions apply only at body. 4. All unmarked pins are case ground. 5. Nominal Weight: 0.35 oz. (10 g).
U-Package Outline
NOTES: 1. Tolerance on 3 place decimals .010(.25) except as noted. 2. Dimensions in inches over millimeters. 3. Dimensions marked with * apply only at body. 4. All unmarked pins are case ground. 5. Nominal Weight: 0.55 oz. (15.4 g).
13Feb96
F rf t e if r to c n a t M ERRI AC /41 Faifel Pl,W estCal o ur h r n o ma in o t c M ri d . dwel,NJ,07006 / 201- 1300 /FAX 201- 0531 l 575575-

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