Switchable diplexer with physical layout to provide improved isolation

A switchable diplexer, comprising:

• (a) a first primary switch comprising a common terminal and M selectable terminals;
• (b) a first set of M secondary switches, each secondary switch comprising a common terminal and N selectable terminals, wherein the common terminal of each switch in the first set of M secondary switches is connected to one of the selectable terminals of the first primary switch;
• (c) a second primary switch comprising a common terminal and M selectable terminals;
• d) a second set of M secondary switches, each secondary switch comprising a common terminal and N selectable terminals, wherein the common terminal of each switch in the second set of M secondary switches is connected to one of the selectable terminals of the second primary switch;
• and
• (e) a plurality of bandpass filters arranged in M groups of N bandpass filters, a first of said M groups comprising an E-band bandpass filter having a passband between 475 MHz and 675 MHz and an F-band bandpass filter having a passband between 650 MHz and 875 MHz electrically arranged in parallel relation to one another and a second of said M groups comprising a D-band bandpass filter having a passband between 1125 MHz and 1675 MHz and a D-low band bandpass filter having a passband between 1125 MHz and 1225 MHz electrically arranged in parallel relation to one another, each bandpass filter having a first terminal connected to one of the N selectable terminals of one of the first set of M secondary switches and a second terminal connected to one of the N selectable terminals of a corresponding one of the second set of M secondary switches;
• (f) wherein the N bandpass filters are arranged in groups of bandpass filters, each group is located adjacent to one another physically.