Your opinion on RF switch

Discussion in 'General Electronics Chat' started by EngIntoHW, Apr 13, 2012.

  1. EngIntoHW

    EngIntoHW Thread Starter Member

    Joined:
    Apr 24, 2010
    Messages:
    128
    Hi,
    Thanks to Steve's help (ssnyde), I found an RF switch which seems suite to my cellular application.

    I'll connect 2 cellular mobile phones (DUT + Reference) to the RF output ports, and an external antenna (located at the roof) to the input port.

    The RF switch I found is CCR-33S3O - SPDT, 12V FAILSAFE, DC-18GHZ (http://www.alliedelec.com/search/pro...0578#tab=specs)
    (133$ per unit)

    This is its spec:
    [​IMG] [​IMG]

    I actually need only DC - 3GHz (not DC - 18GHz), but haven't found one with that range.

    I'd like to ask a few questions please:

    1.
    They don't mention in datasheet that DC should be blocked at the input/output ports, but the schematic doesn't include any DC block capacitors.
    Does it make sense that the RF connector can absorb DC voltage that might be transmitted from the cellular mobiles or come from the antenna?

    2.
    Does the 60dB Isolation refer to Isolation between the 2 output ports or to the Isolation between the not-connected input port and the output port?

    3.
    Does the below graph mean that in the DC - 3GHz range, the switch can handle up to ~80W at each input/output port?
    [​IMG]

    Thank you very much!

    Attached Files:

Similar Threads
Forum Title Date
General Electronics Chat Opinions on graphing calculators? Dec 9, 2013
General Electronics Chat opinions on level of difficulty Apr 30, 2013
General Electronics Chat Any opinions on this school? Dec 26, 2012
General Electronics Chat Looking for opinion Dec 1, 2012
General Electronics Chat Opinion on graduation degree Nov 11, 2012

Share This Page