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參數資料
| 型號： | IMF-2L-1000 |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數： | 1/1頁 |
| 文件大小： | 38K |
| 代理商： | IMF-2L-1000 |
IMF-2 Series
10 to 3000 MHz / Rejection Ratios up to 30 dB / Internal Summing Quadrature / Hi-Rel Package
IMAGE REJECT MIXERS
For further iformatin contact
MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973 575-1300 / FAX 973-575-0531
GENERAL SPECIFICATIONS
(as a Down Converter)
RF/LO Input Characteristics
Impedance:
VSWR:
RF Power Level:
LO Power Level:
IF Bandwidth:
RF Bandwidth:
LO Bandwidth:
Output Characteristics
Conversion Loss:
Image Rejection:
50
nom..
1.5:1 max.
0 dBm nom.
+10 dBm nom.
up to an octave
up to an octave
10%
9 dB max.
25 dB min.
(For Bandwidth as above)
-- 55° to +85°C
Temperature Range:
PRINCIPAL SPECIFICATIONS
Model
Number Freq, f
o
, MHz
IMF-2F-***/ 10 - 1000
IMF-2L-***/ 1000 - 3000
LO Center
Bandwidth Outline
MHz
10% of f
o
10% of f
o
Style
F
L
MODEL NUMBERING NOTE
A complete model number shall be assigned upon estab-
lishment of a full performance specification by the factory
in conjunction with the customer. The model number shall
include an indicator of the center frequency (f
o
) and a
special slash number to distinguish it from related units.
The format of model numbers is as above where *** =f
o
.
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.
24Apr96
DUAL MIXER IMAGE REJECTION
for a given Amplitude and Phase Balance
50
Phase Error (degrees)
0.5
1
1.5
2
2.5
3
45
40
35
30
25
20
15
Ampli.
0.0 dB
0.25 dB
0.5 dB
0.75 dB
1.0 dB
2.0 dB
Image
Rejection
Ratio
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| IMF-2L-3000 | 制造商:MERRIMAC 制造商全稱:MERRIMAC 功能描述:IMAGE REJECT MIXERS |
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