Dbi Omni Antenna
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 ENCORE ENAT OD7 24GHz 7dBi Omni Directional Wireless Antenna EN ATOD7 RETAIL  US $21.99
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FCC Part 15 –5 important points you need to know for Spread Spectrum Applications
Spread-spectrum radio communications, long a favourite technology of the military, is in the midst of explosive commercial development. Driving cost down has always been a top goal of any wireless system designer. The following paragraphs detail the FCC rules and expand on the options available to the system operator or integrator.
Where does Part 15 fit into SCADA?
The Code of Federal Regulations (CFR), the codification of the general and permanent rules and regulations published in the Federal Register, is divided into 50 titles that represent broad areas subject to Federal regulation.
Title 47 of the CFR addresses Telecommunications and is administered by the Federal Communications Commission (FCC). One of the most commonly referenced parts of Title 47 is Part 15, which covers the regulations under which an intentional, unintentional, or incidental radiator that can be operated without an individual license. This covers as well the technical specifications, administrative requirements and other conditions relating to the marketing of FCC 15 devices.
FCC Part 15 Subpart C governs intentional radiators. The various types of intentional radiators covered by Subpart C include cordless telephones, remote control and alarm transmitters, and spread-spectrum systems for wideband data transmission. Intentional radiators governed by Part 15 FCC must either incorporate a permanently attached antenna or provide a unique coupler to prevent the use of un-authorized antennas.
The FCC rules for operation of radio transmitters are, for the most part, very detailed regarding fundamental field strength, power and/or power density, frequency accuracy, and permitted harmonic and spurious emissions.
Part 15 FCC regulations emphasize that the Part 15 device manufacturer must design a system that will not cause interference with, and be able to tolerate, the noisy primary users of the band. This is where spread spectrum systems excel because of their low noise transmissions and ability to operate in an adverse environment. The responsibility for resolving any harmful interference to radio services that might occur from their use lies with the operator of those devices.
How to choose an external antenna
FCC regulations dictate that effective isotropic radiated power (EIRP) at transmitters cannot exceed 36dBm per system when using a 1 Watt radio, based on a 6 dBi antenna. 1 watt transmit power (+30 dBm) plus 6 dBi antenna gives the +36 dBm EIRP limit. More transmit power and less antenna gain, or the opposite, is ok as long as you don't exceed that number.
They don't talk about losses in cables, filters or connectors but those must be included. As an example, if you had 3 dB of losses and a +30 dBm transmitter, then you could use a 9 dBi antenna. If you want a higher gain antenna for more directivity, say 12 dBi, then you need to reduce the transmit power to +27 dBm.
For anyone selling spread spectrum wireless systems, these limitations are a key factor in overall system design. Key resources include the radio manufacturer itself; the top manufacturers are quite prepared to make recommendations for any given application. Path profiles or actual site surveys provide the best methods for determining appropriate antenna gain values.
For typical oil & gas SCADA applications, the most common choices for remote sites remain unity gain omni-directional, or 8 dBi and 12 dBi yagi (directional) antennas. Typical master omni-directional base station antennas are usually 5 dBi or 8 dBi models.
Good SCADA automation can become GREAT when optimized antenna systems are incorporated into the design from the start. Visit http://wavelinkantenna.com to see what great antenna options Wavelink Antenna Systems can offer you for your spread spectrum application. Gary Tootle advises and supports wireless communications professionals throughout USA and Canada at http://wavelinkantenna.com/contact.php
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TerraWave - 5.7-5.85Ghz 8 Dbi Omni Antenna $63.49 5.7-5.85Ghz 8 Dbi Omni Antenna |
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ANT2405v2 5 dBi Omni-directional Antenna - antenna $36.99 NETGEAR ANT2405v2 5 dBi Omni-directional Antenna - Antenna - 802.11 b/g - 5 dBi - omni-directional - white - for ProSafe WAG102 Dual Band Wireless Access Point |
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Wilson Electronics, Inc Wilson Multi-Band Omni-Directional Antenna - Omni-directional - 3.2 dBi, 4.1 dBi, 2.7 dBi, 5.1 dBi -... $56.63 Wilson Electronics, Inc Wilson Multi-Band Omni-Directional Antenna - Omni-directional - 3.2 dBi, 4.1 dBi, 2.7 dBi, 5.1 dBi -... |
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ProSafe ANT2407 Indoor 7 dBi Omni-directional Antenna - antenna $64.99 NETGEAR PROSAFE ANT2407 Indoor 7 dBi Omni-directional Antenna - Antenna - 802.11 b/g - indoor - 7 dBi (for 2.45 GHz) - omni-directional |
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Wilson Electronics, Inc Wilson SignalBoost Antenna - Omni-directional - Pole/Wall - 4 dBi, 3.6 dBi, 5.5 dBi, 4.7 dBi - F-typ... $42.62 Wilson Electronics, Inc Wilson SignalBoost Antenna - Omni-directional - Pole/Wall - 4 dBi, 3.6 dBi, 5.5 dBi, 4.7 dBi - F-typ... |
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Cisco / CISCO AIRONET - ANTENNA - 2 dBi - OMNI DIRECTIONAL / AIR-ANT4941 $12.82 Cisco - CISCO AIRONET - ANTENNA - 2 dBi - OMNI DIRECTIONAL - AIR-ANT4941 |
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NetGear ANT2409 Indoor/Outdoor 9 DBI Omni-Directional Antenna ANT240920000S $136.47 NetGear ANT2409 Indoor/Outdoor 9 DBI Omni-Directional Antenna ANT240920000S |
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NetGear ANT2405v2 5 DBI Omni-Directional Antenna White ANT240520000S ANT2405-20000S $13.9 NetGear ANT2405v2 5 DBI Omni-Directional Antenna White ANT240520000S ANT2405-20000S |
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Cisco 5GHz 4 DBI Triple Omni Antenna AIR-ANT5140V-R AIR-ANT5140V-R= $86.89 Cisco 5GHz 4 DBI Triple Omni Antenna AIR-ANT5140V-R AIR-ANT5140V-R= |
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ProSafe ANT2409 Indoor/Outdoor 9 dBi Omni-directional Antenna - antenna $134.99 NETGEAR ProSafe ANT2409 Indoor/Outdoor 9 dBi Omni-directional Antenna - Antenna - 802.11 b/g - indoor outdoor - 9 dBi - omni-directional - for NETGEAR DG824M FWG114P FWG114 |
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Premiertek Antenna - Omni-directional - 3 dBi, 5 dBi - 1 x RP-SMA ANT5DBIDUAL $29.12 Premiertek Antenna - Omni-directional - 3 dBi, 5 dBi - 1 x RP-SMA ANT5DBIDUAL |
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Enterasys Antenna - Omni-directional - 5 dBi, 7 dBi - 1 x N-type WSANT21 $179.13 Enterasys Antenna - Omni-directional - 5 dBi, 7 dBi - 1 x N-type WSANT21 |
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Aironet Triple Omni Antenna - antenna $158.99 Cisco Aironet Triple Omni Antenna - Antenna - 802.11 a - indoor - 4 dBi - omni-directional - for Aironet 1250 1252AG 1252G |
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Premiertek ANT-9DBI Omni-directional Antenna - Omni-directional - 9 dBi - 1 x RP-SMA ANT9DBI $20.9 Premiertek ANT-9DBI Omni-directional Antenna - Omni-directional - 9 dBi - 1 x RP-SMA ANT9DBI |
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Aironet Antenna Kit Omni - antenna $516.99 Cisco Aironet Antenna Kit Omni - Antenna - 12 dBi - omni-directional - for Aironet 1200 1220 1230 1231 1232 1242 1250 1252 1260 |
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CP TECH OAN-4101 10 dBi Omni Antenna $63.99 10 dBi 3.15" x 30.71" x 20.12" 5 GHz to 5.83 GHz 50 Ohm 9.35 oz Surge protector to prevents the lightning-induced surges or static electricity Omni-directional operation provides extended point to multi-point coverage HPBW/V: 7° HPBW/H: 360° LevelOne's OAN-4101 10dBi omni-directional outdoor antenna is an ideal solution to increase wireless signal coverage and improve signal strength/quality for existing 802.11a wireless devices in the range between 5.5Ghz to 5.825Ghz frequency bands. WAB-3002 Outdoor Access Point CP TECH CP Technologies Linear Vertical N-type Female OAN-4101 OAN-4101 10 dBi Omni Antenna Omni-directional Omnidirectional Antenna Wireless Data Network www.cptechusa.com |
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Enterasys - Antenna - outdoor - 5 dBi (for 2.4 - 2.5 GHz) 7 dBi (for 5150 MHz - 5875 MHz) - omni-directional - for HiPath AP3660 $172.99 Enterasys - Antenna - outdoor - 5 dBi (for 2.4 - 2.5 GHz) 7 dBi (for 5150 MHz - 5875 MHz) - omni-directional - for HiPath AP3660 |
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Enterasys - Antenna - 802.11 a/b/g/n - outdoor - 10 dBi - omni-directional - for HiPath AP3660 $282.99 Enterasys - Antenna - 802.11 a/b/g/n - outdoor - 10 dBi - omni-directional - for HiPath AP3660 |
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HP - Antenna - 2 dBi - omni-directional - for HP A-WA2620-AGN Dual Radio 802.11n FIT Access Point (WW) $26.99 HP - Antenna - 2 dBi - omni-directional - for HP A-WA2620-AGN Dual Radio 802.11n FIT Access Point (WW) |
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TrendNet / TRENDnet Antenna TEW-AO08O 802.11 b/g 2.4GHz Outdoor 8 dBi Omni Directional Retail / TEW-AO08O $56.22 TrendNet - TRENDnet Antenna TEW-AO08O 802.11 b/g 2.4GHz Outdoor 8 dBi Omni Directional Retail - TEW-AO08O |
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TrendNet / TRENDnet Antenna TEW-AO10O 802.11 b/g Outdoor 10 dBi Omni Directional Retail / TEW-AO10O $77.2 TrendNet - TRENDnet Antenna TEW-AO10O 802.11 b/g Outdoor 10 dBi Omni Directional Retail - TEW-AO10O |
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Cisco AiroNet Antenna 802.11 b/g Outdoor 5 DBI Omni-Directional AIRANT2450VN $116.48 Cisco AiroNet Antenna 802.11 b/g Outdoor 5 DBI Omni-Directional AIRANT2450VN |
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Cisco AiroNet Antenna 802.11 b/g Outdoor 8 DBI Omni-Directional AIRANT2480VN $281.36 Cisco AiroNet Antenna 802.11 b/g Outdoor 8 DBI Omni-Directional AIRANT2480VN |
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NetGear ProSafe ANT2407 Omni-Directional Antenna 7 DBI Reverse SMA ANT240710000S $57.44 NetGear ProSafe ANT2407 Omni-Directional Antenna 7 DBI Reverse SMA ANT240710000S |
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CP TECHNOLOGIES CP TECH OAN-2151 Omni-directional Antenna - 15 dBi - N-type OAN2151 $76.66 CP TECHNOLOGIES CP TECH OAN-2151 Omni-directional Antenna - 15 dBi - N-type OAN2151 |
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Cisco Aironet AIR-ANT5140NV-R= MIMO Antenna - Omni-directional - 4 dBi - 1 x RP-TNC AIRANT5140NVR $226.4 Cisco Aironet AIR-ANT5140NV-R= MIMO Antenna - Omni-directional - 4 dBi - 1 x RP-TNC AIRANT5140NVR |
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Netgear ProSafe ANT24O5 Antenna - Omni-directional - 5 dBi - Reverse SMA ANT24O520000S $32.24 Netgear ProSafe ANT24O5 Antenna - Omni-directional - 5 dBi - Reverse SMA ANT24O520000S |
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Motorola ML-2452-HPA5-036 Dual Band Dipole Antenna - Omni-directional - Dipole - 5 dBi - RP-SMA ML2452HPA5036 $197.96 Motorola ML-2452-HPA5-036 Dual Band Dipole Antenna - Omni-directional - Dipole - 5 dBi - RP-SMA ML2452HPA5036 |
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Cisco Aironet AIR-ANT2440NV-R= MIMO Antenna - Omni-directional - 4 dBi - 1 x RP-TNC AIRANT2440NVR $226.4 Cisco Aironet AIR-ANT2440NV-R= MIMO Antenna - Omni-directional - 4 dBi - 1 x RP-TNC AIRANT2440NVR |
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ASUS WL-ANT191 Antenna Omni-directional - 9 dBi - 1 x Reverse SMA WLANT191 $34.94 ASUS WL-ANT191 Antenna Omni-directional - 9 dBi - 1 x Reverse SMA WLANT191 |
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Zyxel ANT1106 802.11b/g/n Omni-Directional High-Gain Antenna - 6 dBi - RP-SMA $53.5 Zyxel ANT1106 802.11b/g/n Omni-Directional High-Gain Antenna - 6 dBi - RP-SMA |
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Intellinet 502306 Antenna - Omni-directional - Pole - 12 dBi - 1 x N-type $76.72 Intellinet 502306 Antenna - Omni-directional - Pole - 12 dBi - 1 x N-type |
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Intellinet 521413 Antenna - Omni-directional - 9 dBi - 1 x N-type $50.65 Intellinet 521413 Antenna - Omni-directional - 9 dBi - 1 x N-type |
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Premiertek Antenna - Omni-directional - Ceiling Mount - 3 dBi - 1 x N-type ANTC2403 $38.64 Premiertek Antenna - Omni-directional - Ceiling Mount - 3 dBi - 1 x N-type ANTC2403 |
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HP Antenna - Omni-directional - Pole/Wall - 8 dBi - 3 x N-type J9720A $290.66 HP Antenna - Omni-directional - Pole/Wall - 8 dBi - 3 x N-type J9720A |
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Netgear ProSafe ANT24O5 5 dBi Omni-directional Antenna $29.99 1 x SMA 1.94 oz 2 Year 2.40 GHz to 2.50 GHz 2592 ft 2592 ft Maximum 3.91" x 2.12" x 1.08" 5 dBi ProSafe ANT24O5 5 dBi Omni-directional Antenna Installation guide Ceiling/wall mount bracket Warranty/Support information card NETGEAR recommends use of antenna cable up to 5 m long The ProSafe ANT24O5 5 dBi Omni-directional Antenna is designed to the extend coverage of wireless IEEE 802.11b or IEEE 802.11g devices. It is especially useful in optimizing coverage when wireless access point or router out of plain view in a wiring closet or above a ceiling pad. Locate it at the top of a cubicle, on a ceiling, desktop or wall, where it is more receptive to radio signals. Ideal placement is on a wall, 2 m high, or on the ceiling facing the area to cover. ANT24O5 Netgear Netgear, Inc Omni-directional Omnidirectional Antenna ProSafe ProSafe ANT24O5 5 dBi Omni-directional Antenna Vertical Wireless Data Network www.netgear.com |