A dual-band RF transceiver (DBXVR) for processing an RF channel signal of selected operating frequency from two disjointed RF-bands of increasing frequency, RFB-1 and RFB-2, the DBXVR comprising:
- a first antenna, for receiving and transmitting an RF channel signal within said RFB-1 wherein said RFB-1 having a number B1 of selectable channels of discrete increasing operating frequencies f11, f12, . . . f1B1;
- means to receive said RFB-1 RF signal, being switchably coupled to said first antenna, said RFB-1 RF signal receiving means further comprises a first frequency downward conversion means for downward-conversion of any of said operating frequencies f11, f12, . . . f1B1 into an Intermediate Frequency (IF) signal of essentially a common frequency fIF and a second frequency downward conversion means for further downward-conversion of said IF signal into a first set of Baseband Inphase (I) and Quadrature (Q) signals;
- means to transmit said RFB-1 RF signal, being switchably coupled to said first antenna, said RFB-1 RF signal transmitting means further comprises a first frequency upward conversion means for upward-conversion of a second set of Baseband I and Q signals into essentially said common frequency fIF and a second frequency upward conversion means for upward-conversion of said common frequency fIF into one of said operating frequencies f11, f12, . . . f1B1 to be transmitted through a corresponding channel of said RFB-1;
- a second antenna, for receiving and transmitting an RF channel signal within said RFB-2 wherein said RFB-2 having a number B2 of selectable channels of discrete increasing operating frequencies f21, f22, . . . , f2B2;
- means to receive said RFB-2 RF signal, being switchably coupled to said second antenna and said first and second frequency downward conversion means, said RFB-2 RF signal receiving means further comprises a third frequency downward conversion means for downward-conversion of any of said operating frequencies f21, f22, . . . , f2B2 into a down-conversion transitional frequency fdtr essentially within the frequency range of (f11, f1B1) wherein said fdtr is further converted by said first frequency downward conversion means into essentially said common frequency fIF that is further converted by said second frequency downward conversion means into a third set of Baseband I and Q signals;
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- means to transmit said RFB-2 RF signal, being switchably coupled to said second antenna and said first and second frequency upward conversion means, said RFB-2 RF signal transmitting means further comprises a third frequency upward conversion means for upward-conversion of a fourth set of Baseband I and Q signals into one of said operating frequencies f21, f22, . . . , f2B2 to be transmitted through a corresponding channel of said RFB-2 after said fourth set of Baseband I and Q signals being first converted into essentially said common frequency fIF by said first frequency upward conversion means following by further conversion of said common frequency fIF into an up-conversion transitional frequency futr essentially within the frequency range of (f11, f1B1) by said second frequency upward conversion means wherein said futr is further converted by said third frequency upward conversion means into said one of said operating frequencies f21, f22, . . . , f2B2.