10 to 3000 MHz / Image Rejection up to 30 dB / Internal Summing Quadrature / Hi-Rel Package
in conjunction with the customer. The model number shall
slash number to distinguish it from related units. The format of
0.
Ampl.
鈩?/div>
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擄 to +85擄C
(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擄
quadrature hybrids. Their principal function is the separation of two signals closely spaced in the frequency domain in, for example, a
receiver鈥檚 IF stage.
2. An
image
is a spurious signal occurring in a receiver鈥檚 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 鈥樷€業(yè)mage Rejection Ratio鈥欌€?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 t
M ERRI AC /41 Faifel Pl,W estCal el,NJ,07006 / 973-
o ur h r n o ma in o t c
M
ri d .
dw l
575-
1300 /FAX 973- 0531
575-
1
2
