High Tech Computer Corporation

無線通訊產品之天線簡介 郭彥良 宏達國際電子股份有限公司 High Tech Computer Corporation 1 Outline „ „ „ Bluetooth and WLAN System Bluetooth antenna WLAN antenna „ „ „ PCMCI...
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無線通訊產品之天線簡介 郭彥良 宏達國際電子股份有限公司 High Tech Computer Corporation

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Outline „ „ „

Bluetooth and WLAN System Bluetooth antenna WLAN antenna „

„ „

PCMCIA network card antenna

Diversity antenna for PCMCIA Conclution 2

Operating band „

BlueTooth: 2400-2483.5 MHz

„

WLAN: „

„

802.11a: 5150-5350 MHz 5725-5825 MHz 802.11b, 802.11g: 2400-2483.5 MHz 3

BlueTooth system

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BlueTooth band „

Operating in the 2.4 GHz ISM (Industrial Scientific Medicine) band

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Power Class

http://www.bluetooth.com

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WLAN system „Wireless LAN是一種提供行動用戶透過無線電連上區域網 路(LAN)的技術。Wireless LAN主要採用IEEE 802.11的通訊 協定為標準。

„這種技術可應用於醫院,學校宿舍,或小型公司辦公室。 若和PCMCIA卡搭配,可運用於筆記型電腦。 7

WLAN band System

Band (MHz)

Data Rate (Mbps)

802.11a

5150-5350 5250-5350 5725-5828

6-54

802.11b

2400-2493.5

1, 2, 5.5, 11

802.11g

2400-2493.5

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Wi-Fi (wireless fidelity) is meant to be used generically when referring of any type of 802.11 network, whether 802.11b, 802.11a, dual-band, etc. 8

WiMAX band „

802.16a, 802.16e „ „ „

„

2.5 GHz band 3.5 GHz band 5 GHz band

Data rate: 75 Mbps

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WLAN Mobile-Unit Antennas „ „ „ „ „

Surface mountable antennas Printed monopole antennas Printed dipole antennas Slot antennas, PIFAs Low-cost microstrip antennas using FR4 substrates

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SMA- Ceramic Chip Antennas „

„ „

Regular patch antenna (ceramic chip as a substrate) PIFAs Monopoles (ceramic chip as a support for the monopole)

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SMA- Ceramic Chip Antenna Helix monopole embedded within the ceramic chip

US Patent 5977927, 5892490

Meandered monopole embedded within the ceramic chip

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Chip Antenna

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SMA- FR4 Chip Antenna (1) FR4 chip antenna (size 6 x 6 x 1.6 mm3) for WLAN operations in the 2.4 and 5.2 GHz bands

Patent pending

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SMA- FR4 Chip Antenna (1.1) 7.3 dB RL BW: 107 MHz @ 2.45 GHz; 820 MHz @ 5.5 GHz; gain level ~ 1 dBi for both bands 0

-10

-20

-30

-40 2E+009

3E+009

4E+009

5E+009

6E+009

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SMA- Plastic Chip or Folded Strip Monopole (2) Dual-band operation in 2.4/5.2 GHz WLAN bands; Antenna size: 12 x 8 x 3 mm3

Patent pending

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SMA- Plastic Chip or Folded Strip Monopole (2.1) 10 dB RL BW: 130 MHz for 2.4 GHz band, 418 MHz for 5.2 GHz band; Gain level about 2 dBi in the 2.4 and 5.2 GHz bands

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SMA- Multilayer Chip Antenna (4)

o

Line-pitch angle: 26.26

Ground size: 25 x 40 mm2 Size: 6 x 10.2 x 1.26 mm3 @ ε r = 7 BW: 363 MHz @ 2.45 GHz Proc. 2001 Asia-Pacific Microwave Conf., Vol. 2, pp. 472-475

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SMA- Multilayer Chip Antenna(4.1)

o

o

Max. Gain: - 1.85 dBi @ E-plane θ = 75 , 285 - 5.85 dBi @ H-plane

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SMA- DR Antennas „ „ „ „

„

Dielectric constant = 20 ~ 100 Compact size Very low dielectric loss No metallic loss, Suitable for higher-frequency operation Wider bandwidth than microstrip antennas 20

WLAN Printed Monopole Antennas „

Integrated design with the system circuit board „

„

Dual-band monopole antenna

Printed monopole with a coaxial feed line

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WLAN Printed MonopoleDual-band monopole (1) Dual-band F-shaped monopole for 2.4/5.2 GHz WLAN bands; antenna size: 10 x 15 mm2

Patent pending

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WLAN Printed MonopoleDual-band monopole (2) Dual-band spiral monopole for 2.4/5.2 GHz WLAN bands

0

-10

-20

-30 1E+009 1.5E+009 2E+009 2.5E+009 3E+009 3.5E+009 4E+009 4.5E+009 5E+009 5.5E+009 6E+009

Patent pending

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WLAN Printed MonopoleDual-band design (3) Dual-band double-T monopole for 2.4/5.2 GHz WLAN bands

Patent pending

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WLAN Printed Monopoleusing a coaxial feed line Dual-band spiral monopole for 2.4/5.2 GHz WLAN bands

Patent pending

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WLAN Printed Monopoleusing a coaxial feed line Dual-band uni-planar monopole for 2.4/5.2 GHz WLAN bands

Patent pending

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PCMCIA antenna

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PCMCIA network card PCMCIA (personal computer memory card international association)

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PCMCIA Card: Movable

Antenna

US Patent Pub. No. 0034924 A1, Feb. 2003

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PCMCIA Card: Rotatable

Antenna

US Patent No. 5949379, Sep. 1999

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PCMCIA Card: Rotatable

Antenna Vertical antenna

US Patent No. 6535172 B2, Mar. 2003

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CF Card: Dual-Band Design

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CF Card: Dual-Band Design

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Diversity Antenna for PCMCIA

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Outline „ „

Diversity antenna for PCMCIA Printed monopole for diversity design „ „

„

Printed monopole antenna Printed Dual-band monopole antenna

Isolation on diversity antenna

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Diversity Antennas „

Combat the multipath problem in WLAN system ¾ Spatial diversity ¾ Pattern diversity ¾ Polarization diversity ¾ Time diversity ¾ Frequency diversity 36

PCMCIA network card

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PCMCIA network card

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Printed monopole for diversity design (1) Spatial/polarization diversity in the 2.4 GHz band

Protruded ground plane improves port decoupling between ports 1 and 2

Patent pending

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S11 and S21 Gain level ~ 1.8 dBi for ports 1 and 2

US Patent 6549170 B1, Apr. 2003

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Radiation pattern Port 1

Port 2

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Printed dual-band monopole for diversity design (1) Diversity monopole antenna for 2.4 and 5.2 GHz dual-band operations

Protruded ground plane improves port decoupling between ports 1 and 2

Patent pending

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S11 and S21 Within the 2.4 and 5.2 GHz bands, S11 < -10 dB and S21 < -28 dB

1.51522

1.53022

1.54522

1.56022

1.57522

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Radiation pattern

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Mobile Phone Main Antenna

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Mobile Antenna 外露式

vs.

單極天線 (monopole antenna) 優點 : 收訊好 缺點 : 1.易折損 2. SAR值大

隱藏式 倒F形平板天線 (PIFA) 優點 : SAR值小 缺點 : 設計困難度高 46

External Antenna Helix Antenna

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Radiation Pattern of Monopole Antenna

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Yagi Antenna (傳統電視天線)

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PIFA PIFA (Planar Inverted-F Antenna)

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SAR (Specific Absorption Rate)

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SAR Comparison

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Anechoic Chamber

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Phantom mode facility

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Conclusion „

Bluetooth and WLAN antenna „ „ „

„ „

„

Surface mountable antennas Printed monopole antennas Printed dipole antennas

AP antenna Diversity antenna for PCMCIA network card Mobile Phone Main Antenna 55

Thank You

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