This is not a new invention. It's just adding a case and a pcb to a nice component from MCL in order to make it handy-er.

This design uses the ADCB-20-82+ from Mini Circuits. A small printed circuit board was designed using FR4 to offer adequate 50 Ω traces, as it should go up to at least 800 MHz. We used sma connectors to keep the geometry small. The case was milled from aluminium. Surface coated with nickel. As connectors, you mayst use MC000242 (Multicomp) or 142-0701-411 (JOHNSON).

This is our naming scheme of the ports. Others may vary.

PORT 1 is the INPUT
PORT 2 is the OUTPUT
PORT 3 is the INPUT COUPLING
PORT 4 is the OUTPUT COUPLING

Therefore S21 ist the insertion loss from PORT 1 to PORT 2.
S11 is the input port matching. S22 is the output port matching. S33 is the input coupling port matching. S44 is the output coupling port matching. S31 is the input coupling insertion loss. S42 is the output coupling insertion loss. Unused ports are terminated with a 50 Ω, usually ANNE-50+ (DC...18 GHz, SMA Termination from MiniCircuits).

Figure above : Directivity



Figure above : S31



Figure above : S42



Figure above : S21

All measurements done with an hp 8753 ES.

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