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RF mixers useful informations
The passive mixers are versatile and very useful components, they are suitable for other applications in addition to theirs classic, some of these applications are well known but others a little less. Here follows some little tips on how to best use them.
Balanced Modulator Demodulator DSB |
Balanced mixers and modulators are substantially equal, mixers are also used as audio modulators or demodulators provided that the IF port is DC coupled, in fact some years ago they were called also as balaced modulators (see VHF Commication magazine 2-96). | ![]() in the reverse mode as demodulator |
Phase detector | Applying two identical frequencies are identical to the RF and OL ports, in IF there will be d.c. voltage proportional to the phase difference of the two signals. This is obviously valid only for those mixers who have the IF port coupled in d.c.. The early synthesizers in the 60s had the phase comparator made by a balaced mixer. Some mixers have a positive polarity output other negative, eg. SBL-1 and SRA-1 have negative polarity with offset of 1mV. |
![]() relative phase between two signals |
PSK QPSK Modulator Demodulator |
In simple words we can say that two mixers, a 0° hybrid and a 90° hybrid can form a modulator or demodulator for digital signals, this happened for example at the beginning with the first GSM module. In this case, however, the bandwidth is limited to 10-15% of the mixer bandwdth. | ![]() |
Attenuator and Limiter |
By applying a signal to the LO port with RF output port it is possible, through the IF input port, make an attenuation with typical range of 3 - 40 dB. The same function is as limiter, pulse modulator, etc.. For example, the mixer SRA-1 and SBL-1 have the minimum attenuation at 3dB with 20 mA of bias. | ![]() |
For more informations see the manufacturers' catalogues about balanced mixers like: Merrimac, Ma-Com, Anzac, RHG, Mini-Circuits, etc… there are often available many application notes of considerable interest.
Suggestions on how to use passive mixers
Order code: | EMT-5 |
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Plug-in RF mixer M/A-COM EMT-5 |
Conditions: | N (The product is brand new) |
RF frequency: | 5 - 1500 MHz |
LO frequency: | 5 - 1500 MHz |
IF frequency: | dc - 1000 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 9.5 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | ETUF-2MHSM |
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Plug-in RF mixer M/A-COM ETUF-2MHSM |
Conditions: | N (The product is brand new) |
RF frequency: | 50 - 1000 MHz |
LO frequency: | 50 - 1000 MHz |
IF frequency: | dc - 1000 MHz |
LO power level: | 13 dBm |
Max. conversion loss: | 9 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | GRA-1 |
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Plug-in RF mixer Mini-Circuits GRA-1 |
Conditions: | N (The product is brand new) |
RF frequency: | 5 - 500 MHz |
LO frequency: | 5 - 500 MHz |
IF frequency: | dc - 500 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 8.5 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | HMC142C8 |
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SMD RF mixer Hittite HMC142C8 |
Conditions: | N (The product is brand new) |
RF frequency: | 6 - 15 GHz |
LO frequency: | 6 - 15 GHz |
IF frequency: | dc - 2 GHz |
LO power level: | 15 dBm |
Max. conversion loss: | 10 dB |
Operating temperature (°C): | -55 / +85 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | HMC329 |
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Chip die RF mixer Hittite HMC329 |
Conditions: | N (The product is brand new) |
RF frequency: | 25 - 40 GHz |
LO frequency: | 25 - 40 GHz |
IF frequency: | dc - 8 GHz |
LO power level: | 13 dBm |
Max. conversion loss: | 11.5 dB |
Operating temperature (°C): | -55 / +85 |
Mounting style: | chip die |
Mixer type: | double-balanced |
Order code: | HPF-505 |
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Plug-in RF mixer Mini-Circuits HPF-505 |
Conditions: | N (The product is brand new) |
RF frequency: | 1 - 500 MHz |
LO frequency: | 1 - 500 MHz |
IF frequency: | dc - 500 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 8 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | HPF-505X |
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Plug-in RF mixer Mini-Circuits HPF-505X |
Conditions: | N (The product is brand new) |
RF frequency: | 10 - 1000 MHz |
LO frequency: | 10 - 1000 MHz |
IF frequency: | 5 - 500 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 8 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | M4A |
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Double-balanced RF mixer WJ Communications M4A |
Conditions: | N (The product is brand new) |
RF frequency: | 10 - 1500 MHz |
LO frequency: | 10 - 1500 MHz |
IF frequency: | dc - 1000 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 10 dB |
Operating temperature (°C): | -54 / +100 |
Mounting style: | flatpack |
Mixer type: | double-balanced |
Order code: | M4G |
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Flatpack RF mixer WJ Communications M4G |
Conditions: | N (The product is brand new) |
RF frequency: | 800 - 2400 MHz |
LO frequency: | 800 - 3500 MHz |
IF frequency: | dc - 1500 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 9.5 dB |
Operating temperature (°C): | -54 / +100 |
Mounting style: | flatpack |
Mixer type: | double-balanced |
Order code: | M9BC |
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Plug-in RF mixer WJ Communications M9BC |
Conditions: | N (The product is brand new) |
RF frequency: | 0.5 - 500 MHz |
LO frequency: | 0.5 - 500 MHz |
IF frequency: | dc - 500 MHz |
LO power level: | 17 dBm |
Max. conversion loss: | 9.3 dB |
Operating temperature (°C): | -54 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | MBA-671 |
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SMD RF mixer Mini-Circuits MBA-671 |
Conditions: | N (The product is brand new) |
RF frequency: | 2400 - 6700 MHz |
LO frequency: | 2400 - 6700 MHz |
IF frequency: | dc - 1000 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 9.2 dB |
Operating temperature (°C): | -40 / +85 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | MD-108 |
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Plug-in RF mixer Anzac MD-108 |
Conditions: | N (The product is brand new) |
RF frequency: | 5 - 500 MHz |
LO frequency: | 5 - 500 MHz |
IF frequency: | dc - 500 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 9 dB |
Operating temperature (°C): | -55 / +85 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | MD-138 |
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Plug-in RF mixer Anzac MD-138 |
Conditions: | N (The product is brand new) |
RF frequency: | 1 - 500 MHz |
LO frequency: | 1 - 500 MHz |
IF frequency: | dc - 500 MHz |
LO power level: | 24 dBm |
Max. conversion loss: | 9.5 dB |
Operating temperature (°C): | -55 / +85 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | MD-149 |
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Flatpack RF mixer Anzac MD-149 |
Conditions: | N (The product is brand new) |
RF frequency: | 10 - 1500 MHz |
LO frequency: | 10 - 1500 MHz |
IF frequency: | dc - 1500 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 10 dB |
Operating temperature (°C): | -55 / +85 |
Mounting style: | flatpack |
Mixer type: | double-balanced |
Order code: | MD4007X |
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SMD RF mixer Anzac MD4007X |
Conditions: | N (The product is brand new) |
RF frequency: | 1 - 1000 MHz |
LO frequency: | 1 - 1000 MHz |
IF frequency: | dc - 1000 MHz |
LO power level: | 7 dBm |
Mounting style: | SMD |
Mixer type: | double-balanced |