Ok gentelmans, we forgott old devices, it's was working many year. Perfect quality of products, with only low stability of DRO oscillator for narrow BW. 1 year ago i build dual synthesizer module for some RX/TX path.
MAIN SYNTHESIZER, based on PLL of QUALCOMM Q3216i. This device not so simple for home builder, but the reason of use is because chip have 3 programming modes - direct parallel, 8-bit bus mode and series interface. Each mode have some set of options to control PLL chip. Datashet of device will attached to tread with many photos of device.Also i'll attache idea release of RX/TX path for single transiever with 144 MHZ band.
RFeference oscillator choosed 20MHZ TCXO, is on board. VCO - my choise is HV93T , cover 4,6~6,0 GHZ. PCB of main synthesizer is routed for one of Q3500 (VCO series) devices from QUALCOMM. I have almost of them, but i walk in other way. Because PLL's maximum frequency in for VCO is 2GHZ input, i build extended PCB in size of Q3500 VCO and set on some schematics with HMC434 (by 8 divider) and some components arownd. In that case PLL see 4700MHZ : 8=587,5MHZ, lock VCO and i can send out 2 carriers at the time - 4700 MHZ & 587,5 MHZ. Some trick is in use who build synth in serios labs. Because i have not deal with phase inverting, coheret side of deal not so important here. All math calculation on schematics diagram. First diags was draw on paper, after test few parts was deleted and changed. Theoretical calculation of LOOP FILTER some time required other values on PCB.
SECOND SYNTHESIZER based LMX1511 old PLL from NS (!). PIC controller consist of little program for controll PLL in lock position. VCO type from mobile phone 967NA (should be some old models of NOKIA) with central frequency of 945 MHZ. 3rd order LOOP FILTER in use, i have not problems with fast sttling time, is single frequency only. Out of synth divided by 10 with MC12080. Good device w/o excitment.
TOTAL PATH. 4700 MHZ doubled to 9,4 GHZ. enen low power of harmonics is good for injection instead DRO. Of course DRO removed from him place on LNB. Now we have IF out on 1089,55 MHZ, This signal filtered by TA1090 SAW filter, fc=1090MHZ. Product on frequency 1089,55 MHZ. This freqeuency subtrac by 945 MHZ (second PLL) in MIXER to 144,55 MHZ. The last one is TRX antenna in. RX path is simple. Next step is TX path. Divided 945 MHZ by 10, result will 94,5 MHZ. Next mixer subtrac 94,5 MHZ from TRX 144,55 MHZ will 50,05 MHZ. Next step is one more conversion. 587,5 MHZ from first PLL multiplied by 4 to get 2350 MHZ. This one mixed with 50,05 MHZ to 2400,05 MHZ for TX OUT.
Many mixers, but simple comstruction, minor size and low power consumption.