The better WLAN Radio Network by an optimal Antenna System

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Garry Hodges
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1 The better WLAN Radio Network by an optimal Antenna System BU Antennas ASY H&S Antennen mme / Pfad...ppt 1

2 The better radio network by optimal antennas What is an antenna? Transmission element between guided (e.g.in cables) and free space electromagnetic waves The transmit antenna radiates electromagnetic energy The receive antenna collects a small amount of the radiated energy and transforms it into a cable transmission system H&S Antennas 2

3 The better radio network by optimal antennas Antenna characteristics: Frequency Horizontal and vertical beamwidth Gain Returnloss or VSWR Antenna Design Applications H&S Antennas 3

4 The better radio network by optimal antennas Wavelength: The wavelength is called lambda (λ) and describes the length of the wave in meter (m). Higher frequencies cause shorter wavelengths. λ 1/2 λ H&S Antennas 4

5 The better radio network by optimal polarisation Polarisation: The polarisation describes the position of the E- Vector (Electric Field Vector) of the wave in space vs. time. Linear and circular polarisation are known. Linear Polarisation Circular Polarisation H&S Antennas 5

The horizontal and vertical planes are the most used patterns and are orthogonal

6 The better radio network by optimal patterns Radiation pattern: The radiation pattern describes the beam characteristic of the antenna or how it radiates. The horizontal and vertical planes are the most used patterns and are orthogonal to each other. Horizontal plan Vertical plane 3D Pattern H&S Antennas 6

7 The better radio network by optimal patterns Beamwidth: 3dB beamwidth is the angle or sector where the antenna radiates the half of its power. If you double the amount of radiating elements, you will receive the half beamwidth and 3dBi more gain. 3dB opening angle horizontal, parallel to the earth s surface 3dB opening angle vertical, perpendicular to the earth's surface Horizontal 3dB beamwidth Vertical 3dB beamwidth H&S Antennas 7

8 The better radio network by optimal gain Gain: Gain (dbi) describes how much energy is oriented in a particular direction Spot light Bulb directive antenna Omni antenna or isotropic radiator H&S Antennas 8

9 The better radio network by optimal performance Returnloss: Returnloss or VSWR describes how much of the reflected power is being reduced compared to the input power. The unit for returnloss is db. Bad installation work will decrease the performance of the system of up to 50%! Za Zi Input Power P(in) transmitted Power P(trans) Reflected Power P(back) H&S Antennas 9

10 The better radio network by optimal antennas Antenna designs: Omni directional antennas Directional antennas Active antennas H&S Antennas 10

11 The better radio network by optimal antennas Omni directional antennas: Standard omnis have a gain of approx. 2 dbi Maximum gain approx. 12 dbi The higher the gain of the antenna: The bigger the physical size of the antenna The smaller the vertical beamwidth H&S Antennas 11

12 The better radio network by optimal antennas Omni directional antennas SPA 2400/360/4/20/V SPA 2400/360/7/0/V 4 dbi 7 dbi H&S Antennas 12

13 The better radio network by optimal antennas Multiband omni antennas SENCITY ART Antenna Multiband 800MHz - 6GHz Gain > 4dBi Indoor-Application SPA 0859/360/4/10/V H&S Antennas 13

14 The better radio network by optimal antennas Directional patch antennas: Standard gain is approx.. 8 dbi Maximum gain approx.. 20 dbi Different polarisations (V, CP, DS) Here also applies: The higher the gain of the antenna: The bigger the physical size of the antenna The smaller the beamwidth H&S Antennas 14

15 The better radio net by optimal antennas Directional-antennas with Patch technology SPA 2400/75/9/0/V SPA 2400/80/9/0/DS 9 dbi 9 dbi, dualslant H&S Antennas 15

16 The better radio net by optimal antennas Directional-antennas with Patch technology SPA 2400/35/14/0/V SPA 2400/27/17/0/V 14 dbi 17 dbi H&S Antennas 16

The better radio network by optimal antennas Active antennas: Integrated amplifier Only the receipt path (Rx) is amplified Very large ranges with small

17 The better radio network by optimal antennas Active antennas: Integrated amplifier Only the receipt path (Rx) is amplified Very large ranges with small antenna size Optimal for rural ranges suitably Very easy mounting due to large beamwidths Voltage supply over coaxial cables H&S Antennas 17

18 The better radio network by optimal mounting material Mounting material: Side / downtilt brackets Mast mounting material Metal bands for different mast diameters Power splitters Jumper cables H&S Antennas 18

19 The better radio network by optimal coverage Antenna choice: H&S Antennas 19

20 The better radio network by optimal coverage Range: Longest distance that can be covered between the transmitter and the receiver depends on: Transmitter power Receiver Sensitivity Wavelength Antenna type Installed Antenna Height Atmospheric and Environmental conditions H&S Antennas 20

21 The better radio network trough an optimal antenna Range: Frame conditions: Output power at the Antenna 100mW /20 dbm (EIRP) Free field propagation, line of sight up to 500m up to 1400m up to 2000m up to 2800m SPA 2400/360/4/0/V SPA 2400/75/9/0/V SPA 2400/35/14/0/V SPA 2400/27/17/0/V H&S Antennas 21

22 The better radio network by optimal coverage Loss in Freespace m db H&S Antennas 22

23 The better radio network by optimal coverage Attenuation of various materials: Obstacles Thin wall Wooden wall Aluminium blind closed Lattice window with wooden frame Lattice window with steel frame Steel shelves / cupboards Brick wall Conrete wall Concrete ceiling Elevator Typicle 2-5dB 5dB 8dB 4-5dB 10dB 15dB 6-12dB 10-20dB 20dB 20-30dB H&S Antennas 23

24 The better radio network by an optimal link budget +9dBi Max Propagation loss 102dB -3dB SPA 2400/75/9/0/V Jumper cable Receiver sensitivity at 11Mbit/s: -82dB AP +14dBm/ 35mW (14dBm - 3db + 9dBi) -102dB = -82dBm Receiver sensitivity Max. propagation loss Radiated power (max.20dbm/100mw) H&S Antennas 24

25 The better radio network trough an optimal point to point connection Fresnel Zone D r d λ * D* d r = D + d H&S Antennas 25

26 The better radio network trough an optimal point to point connection Max Propagation loss 108dB +14dBi +14dBi SPA 2400/35/14/0/V Jumper cables -8dB -8dB AP 14dBm/ 35mW Receiver sensitivity at 11Mbit/s: -82dB AP 14dBm - 8db + 14dBi -108dB + 14dBi - 8dB = -82dBm H&S Antennas 26

27 The better radio network by optimal antennas Results External antennas increase the range... reduce the number of APs... reduce the installation costs... convince by way of pleasing Design, also architects... increase the performance of your system... radiate in the desired direction ==> security H&S Antennas 27

28 Other Huber+Suhner Antenna line products Correguated cables Jumper cables Quick Fit connectors EMP s Installation material Grounding kits 1 5/8 1 1/4 7/8 1/2 1/2 HF 3/8 H&S Antennas 28

29 HUBER+SUHNER Your Partner for optimal Antennas H&S Antennas Back to Main Menu 29

Colubris Networks. Antenna Guide

Colubris Networks. Antenna Guide Colubris Networks Antenna Guide Creation Date: February 10, 2006 Revision: 1.0 Table of Contents 1. INTRODUCTION... 3 2. ANTENNA TYPES... 3 2.1. OMNI-DIRECTIONAL ANTENNA... 3 2.2. DIRECTIONAL ANTENNA...