RF
in [Design]
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From: john on 24 Feb 2010 17:08 Hi, I am trying to put together a wireless system fo the first time. I was told to use a wireless chip nRF24z1 for both transmitter and receiver. I need to layout the PCB for this chip first. So, I found the following note http://www.nordicsemi.com/files/Product/applications/nAN24-09_nRF24Z1_RF_layout_rev1_0.pdf But I can not understand the following issue The note says that all layouts should be fitted with a single ended connection to a 50ohm antenna by using a differential to single ended matching network. What does it exctly mean? Thanks John
From: Andrew Holme on 24 Feb 2010 17:16 "john" <conphiloso(a)hotmail.com> wrote in message news:a5c1ce52-16da-4fc0-9544-1c25e85bbc47(a)c16g2000yqd.googlegroups.com... > Hi, > > I am trying to put together a wireless system fo the first time. I was > told to use a wireless chip nRF24z1 for both transmitter and receiver. > I need to layout the PCB for this chip first. So, I found the > following note > > http://www.nordicsemi.com/files/Product/applications/nAN24-09_nRF24Z1_RF_layout_rev1_0.pdf > > But I can not understand the following issue > > The note says that all layouts should be fitted with a single ended > connection to a 50ohm antenna by using a differential to single ended > matching network. What does it exctly mean? > > Thanks > John The device has ANT1 / ANT2 differential antenna connection pins. The network comprising L1, L2, L3, C5 and C6 connects this to the single-ended "RF" port.
From: john on 24 Feb 2010 17:34 Hi, Thanks. what is single ended RF port. John
From: Andrew Holme on 24 Feb 2010 17:40 "john" <conphiloso(a)hotmail.com> wrote in message news:82819282-3b04-4d23-8051-6b3081686289(a)y17g2000yqd.googlegroups.com... > Hi, > Thanks. what is single ended RF port. > > John > When you have one side of the circuit live and the other is ground - like coax - that's single ended.
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