Issues facing while usage of HMC321 in wideband frequency of operation

Hello 

Team Analog Devices

Greetings of the day.,

We have designed SP8T (HMC321) PCB with reference of EVM of Same part No .

  1. While Testing in wide band range of frequencies the insertion loss Is very huge.

Problem observed ; 

From frequency 5000 to 6000MHz we observed poor return loss performance and High insertion loss almost 10dB instead of 4dB as per datasheet.

Note:

Capacitors we used the same value of EVM.

Please suggest any further steps to tune return loss and insertion loss..!!

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