Title: (IMT-2000? ??? ???)
1? ? ? ? ? ? ? ?
(IMT-2000? ??? ???)
???? ??? ??? ???? ??? ??? ? ? ? 2003. 11.
03. 97101566 ? ? ? 97101600 ? ? ? 97101625 ? ?
? ? 4 ?
2IMT-2000 ? ???
1. ? ?
IMT-2000(International Mobile Telecommunication
2000)? ITU-R ?? ???? ???? ?? ?3?? ???? ?????.
2. ? ?
IMT-2000 ???? ??? ??? ??????? ???? ?? ? ?? ????
???? ??, ??? ????? ????? ?? ? ?, ??, ????? ???
???? ???, WLL, ???? ?? ? ????? ?????? ???? ???
??? ????? ??? ?? ???? ??.
3????
1. ??????? ???
? ?
- ??? ??? ??.
- ????? ?? ??.
- ????? ???, ???? ?? ??? ? ??.
- ???? ????? ????? ??? ??? ?? ?? ??
- ??.
- ?? ?? ???? ?? ??
- ????? ????? ???? ??? ?? ??? ???
- ? ??.
4? ?
- ???? ??.
- ??? ??(?? ?? 5-8dBi)
- feed? radiating elements ??? isolation? ???
- surface wave? ?? ???? ??.
- ??? ??? ??.
- ?? Q?? ???.
52. Feeding method? ??
Microstripline feed
? ?
? ?
- Spurious radiation ??
- ???? ??? ?? transformer ??
6Probe feed
? ?
- Probe ??? ???? ???? ?? - Probe ??? ???? ?? ???
????? ????
? ?
- ??? ???? ????? ?? ?????? ? ??? ? ??? ??
7Proximity-coupled feed
? ?
- feed? patch ??? ???? ??? ??.
- ??? ??? ???? ???? ???.
? ?
- ???? ??? ???.
83. Aperture Coupled feed
patch
substrate 1
ground
slot
substrate 2
Feed line
??? feed? ??? slot? ??? ???? ???? ? ??.
9? ?
- Feed network? radiator? ???? ??? ? ??.
- (??? ?? ??? ??? ??)
- Feed?? spurious radiation? ??.
- ?? parameter?? ???? ????.
- ?????? cross-polarized radiation? ??.
- ? substrate ??? ?? ground plane? feed? radiator
- ? ???? ????? ????? ??? ?? spurious
- radiation? ?????.
? ?
- ??? ?? ?? ??? ????.
- ground plane ?? ? ?? ??? ????.
10Design Specification
Frequency Range Frequency Range 1885-2200MHz
BandWidth(MHz) BandWidth(MHz) 350MHz
VSWR VSWR 1.5 1 max
Gain Gain 7
Impedance Impedance 50
Beam width Horizontal
Beam width Vertical
Polarization Polarization Linear(Vertical)
11Simulation ??
Gain S1,1
12????
Gain? IMT-2000???? ??? 7dB??? ????. S1,1? ?????
????? ???(-14dB) ?? ??? ? ??? ????? ???? ???
??. (narrow bandwidth)
13Future Work
??? ?? ??? ????(Wide bandwidth Technique, Stub
matching, ??? ??? ???? Bandwidth? ??? Spec? ????
???? ??? ? ?? ???.
144. Project ????
IMT-2000 ????? ?? ???? ????? ?? ????. ???
??????? ???? ???? ?? ???? ?? ?? ???? ????. ???
?? ??? ?? ?? IE3D AS tool? ???? ??? ?? ??????
???. ? ???? ??? ???? ?? ?????? ???. ? ???? ?????
??? ???? ??? ??? ???? ????. ? ??? ????? ?? ??????
?? ??? ????. ? ?? ??? ???? VNA(Vector Network
Analyzer)?? ????? ???? ???? ????? ????.
155. ? ? ? ?
??? ?? ?????? ??? ??? ?? ??? ??????????? ????
????? ?? ??? ?? ?? ? ??? ?? ??? ??? ????. ??
?????? ??? ????? IE3D AS tool? ???? IMT-2000 ?
??? ???? ?????? ???. ???????? ?? ????? ????
???? ? ????? ?? ??? ?? ?? ??? ???? ?? ??? ????.
166. Demo ????
IMT-2000 ???? ???? ?? ????? ???? ??? ??? ??? ????
???? ?????. ??? ?????? ?????? ???? ???? ???? ????
??? ??. ?? ?? ??? ?? VNA(Vector Network
Analyzer)?? ??? ???? ?? ????? ? S_11 ???? ??
18852200??? -14???? ???? ???? ?????? ? ? ??.
??? ????????? ??? ???? ????(SPEC)? ?? ??? ???
???? ??? ? ??? ? ? ??. ??? ??? ?? ??????? 7??????
?? ??? ??? 60? ? Directional Antenna ?????.