IMF-2F-10 MERRIMAC | Alldatasheet

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IMF-2 Series IMAGE REJECT MIXERS 10 to 3000 MHz / Rejection Ratios up to 30 dB / Internal Summing Quadrature / Hi-Rel Packag e Fo r f u rther infor m at ion 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: 50 Ω 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. (For Bandwidth as above) Temperature Range: -- 55° to +85°C PRINCIPAL SPECIFICATIONS Model LO Center Bandwidth Outline Number Freq, fo, MHz MHz Style IMF-2F-*/ 10 - 1000 10% of f o F IMF-2L-*/ 1000 - 3000 10% of f o 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 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 d omain 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 diffe rence 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 gr aph 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 desi gned and built in accord with applicable specifications. Designers are invited to work closely with Merrimac engineers to insure best result s. 6. All Merrimac Image Reject Mixers comply with applicable sections of MIL-M-28837 and may be suppl ied screened for compliance with additional specifications for military and space applications requiring the highest reliability. 24Apr96 DUAL MIXER IMAGE REJECTION Phase Error (degrees) Image Rejection (dB) for a given Amplitude and Phase Balance 0.5 1 1.5 2 2.5 3 Ampli. Balance 0.0 dB 0.25 dB 0.5 dB 0.75 dB 1.0 dB 2.0 dB Image Rejection Ratio