Receive only QuadPlexer enable multi-transceiver stations (contest, DX pedition) to share a single, receive only, multi-band antenna on four different bands with minimum possible losses and descent isolation.
Any receive antenna and arrays can be used: Beverage of any kind, Phased loops and verticals, K9AY, SAL, Flag, Penant, DHDL etc.
Just connect four receivers to one of the outputs.
And you can share these outputs between 2-4 transcivers on the same band using additional 2-4 way splitters.
Total losses in a chain to 8 radios can de as low as -4.5db only with good isolation between bands.!