아이폰 4G 안테나

밖에 철로된 테두리가 안테나라는 정보를 듣고는 심심해서 검색 고고싱~

GPS는 대략 1.2Ghz 정도
Wifi는 2.4Ghz
Bluetooth는 대략 2.4Ghz

UMTS는 1.9Ghz(유럽) / 1.7Ghz(미국) / 2.1Ghz(미국)
GSM은 1.9Ghz / 1.7Ghz ... 등등등 너무 많다 ㄱ-


아무튼, GPS는 2배 길이 안테나로 증폭시키는 셈치고
2.4Ghz대 안테나 하나와 1.9Ghz대 안테나. (이녀석은 2.4Ghz보다는 조금 더 길어진다.)
그런 이유로~ 아래 사진을 보면 왼쪽이 오른쪽 보다 상대적으로 길이가 조금 짧다.

[링크 : http://poem23.com/1974]

머. 아니면 말구? ㅋ

L1 || 1575.42 || Mix of Navigation Message,C/A code and P(Y) code
L2 || 1227.60 || P(Y) code, plus the new L2C code on the Block IIR-M and newer satellites since 2005
L3 || 1381.05 || Used by Nuclear Detonation (NUDET) Detection System Payload (NDS);
                       signals nuclear detonations/high-energy infrared events. Used to enforce nuclear test ban treaties
L4 || 1379.913 || Being studied for additional ionospheric correction
L5 || 1176.45 || Proposed for use as a civilian safety-of-life (SoL) signal*

[링크 : http://en.wikipedia.org/wiki/Gps]

FCC Sec.15.249 Operation within the bands 902–928 MHz, 2400–2483.5 MHz, 5725–5875 MHZ, and 24.0–24.25 GHz.

[링 크 : http://en.wikipedia.org/wiki/Wifi]

Bluetooth uses a radio technology called frequency-hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 bands of 1 MHz width in the range 2402-2480 MHz.

[링크 : http://en.wikipedia.org/wiki/Bluetooth]

The specific frequency bands originally defined by the UMTS standard are 1885–2025 MHz for the mobile-to-base (uplink) and 2110–2200 MHz for the base-to-mobile (downlink). In the US, 1710–1755 MHz and 2110–2155 MHz will be used instead, as the 1900 MHz band was already utilized.

[링크 : http://en.wikipedia.org/wiki/Umts]

System	Band	Uplink (MHz)	Downlink (MHz)	Channel number
T-GSM-380	380	380.2–389.8	390.2–399.8	dynamic
T-GSM-410	410	410.2–419.8	420.2–429.8	dynamic
GSM-450	450	450.4–457.6	460.4–467.6	259–293
GSM-480	480	478.8–486.0	488.8–496.0	306–340
GSM-710	710	698.0–716.0	728.0–746.0	dynamic
GSM-750	750	747.0–762.0	777.0–792.0	438–511
T-GSM-810	810	806.0–821.0	851.0–866.0	dynamic
GSM-850	850	824.0–849.0	869.0–894.0	128–251
P-GSM-900	900	890.2–914.8	935.2–959.8	1–124
E-GSM-900	900	880.0–914.8	925.0–959.8	975–1023, 0-124
R-GSM-900	900	876.0–914.8	921.0–959.8	955–1023, 0-124
T-GSM-900	900	870.4–876.0	915.4–921.0	dynamic
DCS-1800	1800	1710.2–1784.8	1805.2–1879.8	512–885
PCS-1900	1900	1850.0–1910.0	1930.0–1990.0	512–810

[링크 : http://en.wikipedia.org/wiki/GSM_frequency_bands]