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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: | SIM-43 |
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SMD RF mixer Mini-Circuits SIM-43+ |
Conditions: | N (The product is brand new) |
RF frequency: | 750 - 4200 MHz |
LO frequency: | 750 - 4200 MHz |
IF frequency: | dc - 1500 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 8.6 dB |
Operating temperature (°C): | -40 / +85 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | SIM-63LH |
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SMD RF mixer Mini-Circuits SIM-63LH+ |
Conditions: | N (The product is brand new) |
RF frequency: | 750 - 6000 MHz |
LO frequency: | 750 - 6000 MHz |
IF frequency: | dc - 1500 MHz |
LO power level: | 10 dBm |
Max. conversion loss: | 9.3 dB |
Operating temperature (°C): | -40 / +85 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | SIM-73L |
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Mixer RF SMD Mini-Circuits SIM-73L+ |
Conditions: | N (The product is brand new) |
RF frequency: | 2400 - 7000 MHz |
LO frequency: | 2400 - 7000 MHz |
IF frequency: | dc - 3000 MHz |
LO power level: | 4 dBm |
Max. conversion loss: | 8.5 dB |
Operating temperature (°C): | -40 / +85 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | SIM-83 |
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SMD RF mixer Mini-Circuits SIM-83+ |
Conditions: | N (The product is brand new) |
RF frequency: | 2300 - 8000 MHz |
LO frequency: | 2300 - 8000 MHz |
IF frequency: | dc - 3000 MHz |
LO power level: | 7 dBm |
Max. conversion loss: | 8.9 dB |
Operating temperature (°C): | -40 / +85 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | SKY-60MH |
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SMD RF mixer Mini-Circuits SKY-60MH |
Conditions: | N (The product is brand new) |
RF frequency: | 2500 - 6000 MHz |
LO frequency: | 2500 - 6000 MHz |
IF frequency: | dc - 1500 MHz |
LO power level: | 13 dBm |
Max. conversion loss: | 9.5 dB |
Operating temperature (°C): | -40 / +85 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | SM4T |
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SMD RF mixer Stellex SM4T |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 1 - 3400 MHz |
LO frequency: | 1 - 3400 MHz |
IF frequency: | 1 - 2000 MHz |
LO power level: | 10 dBm |
Max. conversion loss: | 11 dB |
Operating temperature (°C): | -54 / +100 |
Mounting style: | SMD |
Mixer type: | double-balanced |
Order code: | SRA-11H |
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Plug-in RF mixer Mini-Circuits SRA-11H |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 10 - 3000 MHz |
LO frequency: | 10 - 3000 MHz |
IF frequency: | 10 - 1000 MHz |
LO power level: | 17 dBm |
Max. conversion loss: | 12 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | triple-balanced |
Order code: | SRA-173H |
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Plug-in RF mixer Mini-Circuits SRA-173H |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 5 - 1200 MHz |
LO frequency: | 5 - 1200 MHz |
IF frequency: | dc - 1200 MHz |
LO power level: | 17 dBm |
Max. conversion loss: | 8.5 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | triple-balanced |
Order code: | SRA-6 |
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Plug-in RF mixer Mini-Circuits SRA-6 |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 0.003 - 100 MHz |
LO frequency: | 0.003 - 100 MHz |
IF frequency: | dc - 100 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: | TAK-5R |
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RF plug-in mixer Mini-Circuits TAK-5R |
RF frequency: | 0.05 - 200 MHz |
LO frequency: | 0.05 - 200 MHz |
IF frequency: | dc - 200 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: | TFM-15-9 |
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Plug-in RF mixer Mini-Circuits TFM-15-9 |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 10 - 3000 MHz |
LO frequency: | 10 - 3000 MHz |
IF frequency: | 10 - 800 MHz |
LO power level: | 10 dBm |
Max. conversion loss: | 8.5 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | triple-balanced |
Order code: | TFM-2 |
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Plug-in RF mixer Mini-Circuits TFM-2 |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 1 - 1000 MHz |
LO frequency: | 1 - 1000 MHz |
IF frequency: | dc - 1000 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: | TFM-2H |
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Plug-in RF mixer Mini-Circuits TFM-2H |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 5 - 1000 MHz |
LO frequency: | 5 - 1000 MHz |
IF frequency: | dc - 1000 MHz |
LO power level: | 17 dBm |
Max. conversion loss: | 10 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | TFM-3H |
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Plug-in RF mixer Mini-Circuits TFM-3H |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 0.1 - 250 MHz |
LO frequency: | 0.1 - 250 MHz |
IF frequency: | dc - 250 MHz |
LO power level: | 17 dBm |
Max. conversion loss: | 8.5 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |
Order code: | TFM-3MH |
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|
Plug-in RF mixer Mini-Circuits TFM-3MH |
Conditions: | N- (The product is brand new but it comes from an old production) |
RF frequency: | 1 - 250 MHz |
LO frequency: | 1 - 250 MHz |
IF frequency: | dc - 250 MHz |
LO power level: | 13 dBm |
Max. conversion loss: | 8.5 dB |
Operating temperature (°C): | -55 / +100 |
Mounting style: | plug-in |
Mixer type: | double-balanced |