Antenna Circuit; Tantenna - Nokia NKC-1X Series Technical Documentation Manual

CCS Technical Documentation
NTC voltage is used for diode temperature compensation and for thermal shut down
when radio board's temperature exceeds +85°C.
False TX indication is based on detected power measurement when carrier is not on.
The insertion loss of coupler is –0.42dB (max) at cellular band and –0.48dB (max) at PCS
band. Typical values for insertion losses are about –0.2dB. The filtering performance of
diplexer is taken in account in system calculations.
(For AMPS mode PL2 24.5 dBm, PL2 27.3 dBm for digital mode. )

Antenna Circuit

Here the antenna circuit stands for duplex filters and "thru diplexer". The cellular band
duplex filter is band pass type SAW filter with typical insertion loss about –2.0dB. Typical
insertion loss of "thru diplexer" is about –0.1dB. IRF Performance
The output power tuning target for power level 2 after diplexer (or after switch for exter-
nal RF) is +27.3dB for digital modes and +24.5 for analog mode. See table below. Modu-
lation accuracy and ACP will be within limits specified in IS-136/137.
Power Level
2
3
4
5
6
7
8
9
10
Antenna
The NKC-1X antenna solution is an internal single resonance PIFA-antenna. This antenna
has a common feeding point for both antenna radiators, which results in the need for a
diplexer. In a singleband transceiver, a SMD compatible through chip can be used.
Issue 1 02/03
PGA
Pout
TDMA800
3-4 27.3
4 23.3
5 19.3
6 15.3
7 11.3
8 7.3
9 3.3
10 -0.7
11 -4.7
Nokia Corporation
System Module
AMPS
24.5
21
17.5
13.5
9.5
5.5
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-
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NKC-1X
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