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9 Results Found For "field"
COMPACtenna 2M/440+ Optimized High Performance Dual-Band Ham Radio Antenna
COMPACtenna 2M/440+ provides high performance using a unique Electric-Magnetic Field Diversity design, Patent No. 9,407,001. Superior Omni-directional coverage is achieved far beyond what would be expected for the antenna size. The multi-faceted geometric design of the antenna includes "extended flat monofilar spiral Tesla-like coils" that serve as the LCR matching system, resonating as an integral part of the signal field generation. No external or internal electronic lossy matching components are used. This design establishes diverse electromagnetic fields resulting in signal stability and performance greater than expected in NLOS (Non-Line-Of-Sight) environments, reducing the effects of ionospheric polarization shifts. COMPACtenna 2M/440+ Specifications: * Frequency Coverage: 144-148 MHz, 430-450 MHz * Power Rating: 100 W 2M; 75 W 70cm * Duty Cycle, Max. Power: 1 minute transmit limit in a 2-minute period * Repeater Operation: 30W maximum at the antenna * Maximum Ambient Temperature: 130 degrees F (hotter conditions, sun exposure, limited air flow reduces duty cycle) * Gain: +5 dB-MEG: Due to diverse EM fields of the Magnetic Field Resonator, performance is greater than predicted by singular polarization field-range tests * SWR, nominal: < 2.1:1 144-148 MHz, 430-450 MHz. Best SWR on VHF frequencies when COMPACtenna 2M/440+ antenna is mounted on an upper corner of a vehicle, NOT center mount. Flat style magnetic mounts provide the best SWR results. SWR varies with size and shape of the vehicle.
( 26 )
$199.00
COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antennas
COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antennas COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antennas are very small, high performance dual-band antennas. Even though they're only 7.5 inches tall, they provide superior Omni-directional coverage far beyond their size, using a unique Electric-Magnetic Field Diversity patented* design. These are attractive, rugged and weatherproof radome style mobile antennas that will allow vehicle passage into most garages, drive-through lanes and even under low tree branches without having to remove or tilt the antenna structure. COMPACtenna NMO Mobiles are easy to install and use, requiring no tuning. This Tri-band model covers three of the most popular VHF and UHF amateur bands. A typical SWR under 2:1 across the frequency ranges 144-148 MHz, 219-225MHz and 420-450MHz, depending only upon the vehicle mount or base mount position. This antenna handles up to 85W on the 2M band and 50W on 220 MHz and 440 MHz. It also provides excellent wide-band receive coverage from 100-1500 MHz. Its industry standard NMO base is compatible with a number of NMO vehicle magnet mounts, grounded NMO hole-mounts, hatch or trunk lip mounts or angle bracket mounts. The required NMO mount is not included with the antenna, but is available from DX Engineering. The revolutionary COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antenna is also configurable as an indoor base or as an inconspicuous, outdoor base antenna by adding an optional CompacCounterpoise. *Patent No. US 9,407,001 – Unique Electric/Magnetic Field Diversity Science & Technology Patented Design
( 31 )
$199.00
COMPACtenna Model 2M/440 Dual-Band NMO Mobile Antennas
COMPACtenna Model 2M/440 Dual-Band NMO Mobile Antennas are very small, high performance dual-band antennas. Even though they're only 7.5 inches tall, they provide superior Omni-directional coverage far beyond their size, using a unique, patented* Electric-Magnetic Field Diversity design. These are attractive, rugged and weatherproof radome style mobile antennas that will allow vehicle passage into most garages, drive-through lanes and even under low tree branches without having to remove or tilt the antenna structure. COMPACtenna NMO Mobiles are easy to install and use, requiring no tuning. This dual-band model covers the two most popular VHF and UHF amateur bands, 2 meters and 70 centimeters. A typical SWR under 2:1 across the frequency ranges 144-148 MHz and 420-450MHz, depending only upon the vehicle mount or base mount position. This antenna handles up to 85W on the 2M band and 50W on 70 cm. Its industry standard NMO base is compatible with a number of NMO vehicle magnet mounts, grounded NMO hole-mounts, hatch or trunk lip mounts or angle bracket mounts. The required NMO mount is not included with the antenna, but is available from DX Engineering. The revolutionary COMPACtenna Model 2M/440 Dual-Band NMO Mobile Antenna is also configurable as an indoor base or as an inconspicuous outdoor base antenna by adding an optional CompacCounterpoise. It may be mounted in an attic or other stealth location. *Patent No. US 9,407,001 – Unique Electric/Magnetic Field Diversity Science & Technology Patented Design
( 28 )
$186.00
COMPACtenna LMR-I Land Mobile Radio Antenna
The COMPACtenna LMR-I Land Mobile Radio Antenna is a high performance, low-profile mobile antenna designed for government and commercial applications, with coverage of three optimized frequency ranges: -- High VHF 136-174 MHz -- Low UHF 378-512 MHz -- High UHF 750-960 MHz COMPACtenna LMR-I works for analog and digital operation modes for Police, Fire, Sheriff, Emergency Medical, State Highway Patrol, Homeland Security, U.S. Federal, Military and Business-Commercial applications. The LMR-I is an attractive 9 in. tall, cylindrical radome-style antenna with a reliable leaf spring style NMO mount base for standard center-stud style NMO mobile mounts. It may be used for Vehicular or Base Station – Repeater operations by adding an optional CompacCounterpoise. COMPACtenna LMR-I provides high performance using a unique Electric-Magnetic Field Diversity design. Superior Omni-directional coverage is achieved far beyond what would be expected for the antenna size. The multi-faceted geometric design of the antenna includes "extended flat monofilar spiral Tesla-like coils" that serve as the LCR matching system, resonating as an integral part of the signal field generation. No external or internal electronic lossy matching components are used. This design establishes diverse electromagnetic fields, resulting in signal stability and performance greater than expected in NLOS (Non-Line-Of-Sight) environments, reducing the effects of ionospheric polarization shifts. COMPACtenna LMR-I Specifications: * Frequency Coverage: 136-174 MHz, 378-512 MHz, 750-960 MHz * Power Rating: 100 W VHF; 75 W UHF * Duty Cycle, Max. Power: 1-minute transmit limit in a 2-minute period * Repeater Operation: 30W maximum at the antenna * Maximum Ambient Temperature: 130 degrees F (hotter conditions, sun exposure, limited air flow reduces duty cycle) * Gain: 3 dBi, nominal (performance greater than predicted based on gain alone in Non-Line-Of-Sight environments * SWR, nominal: < 2.1:1 140-162 MHz, 400-500 MHz, 750-960 MHz; <2.5:1 136-140 MHz, 162-174 MHz, 378-400 MHz, 500-512 MHz. Best SWR on VHF frequencies when LMR-I antenna is mounted on an upper corner of a vehicle, NOT center mount. Flat style magnetic mounts provide the best SWR results. SWR varies with size and shape of the vehicle.
( 1 )
$239.00
COMPACtenna Model SCAN-III NMO Mobile Monitor Antennas
COMPACtenna Model SCAN-III NMO Mobile Monitor Antennas are very small, high performance dual-band antennas. Even though they're only 9 in. tall, supporting scanner reception from 100 through 1500 MHz and is optimized for 3 wide frequency bands, VHF 136-174 MHz, UHF 378-512 MHz and 750-960 MHz. They provide superior Omni-directional coverage far beyond their size, using a unique Electric-Magnetic Field Diversity patented* design. These are attractive, rugged and weatherproof radome style mobile antennas that will allow vehicle passage into most garages, drive-through lanes—and even under low tree branches without having to remove or tilt the antenna structure. COMPACtenna Model SCAN-III NMO Mobiles are easy to install and use, requiring no tuning. Their industry standard NMO base is compatible with a number of NMO vehicle magnet mounts, grounded NMO hole-mounts, hatch or trunk lip mounts or angle bracket mounts. The required NMO mount is not included with the antenna, but is available from DX Engineering. The revolutionary COMPACtenna Model SCAN-III NMO Mobile Monitor Antenna is also configurable as an indoor base or as an inconspicuous outdoor base antenna. Add an optional Larsen BSAKIT NMO Mast Mount and bend the radials downward at a 70 degree angle for best results. It may be mounted in an attic or other stealth location. *Patent No. US 9,407,001 – Unique Electric/Magnetic Field Diversity Science & Technology Patented Design
( 10 )
$199.00
COMPACtenna PERFECT CB
COMPACtenna PERFECT CB is a hand-crafted optimized performance dedicated 27 MHz CB band vertical whip antenna that combines novel engineering with quality machining. Each antenna is precisely tested and tuned in Ohio, USA. This specialized 3/8-24 thread stud mount whip is approximately 69 in. tall and handles 500W RF power. Above the unique horizontal coil structure, a stainless steel whip adjustment ferule. For mobile applications, strategic positioning of the vertical on the vehicle will affect SWR and performance. A grounded mount should be used for the best results. The PERFECT CB is also an excellent base station vertical when mounted at least 10 ft. above the ground using a sufficient ground plane. The ground plane can be 8 or more feet of metal, horizontal or angled downward, at least 10 ft. away from other metal and antenna. Installation examples include magnet, clamp or bracket mounting on house, shed or building metal roof (upper area), or a well-supported metal gutter or trim, or a metal railing. Gain: Nominal 7(+) dB-MEG – Mean Effective Gain. COMPACtenna's PERFECT CB covers diverse EM (Electro-Magnetic) fields, achieving phase diversity in all planes, vertical and orthogonal polarizations-elliptical polarization for significantly improved communications.
( 1 )
$299.00
COMPACtenna 220MAX Optimized High Performance 222-225 MHz NMO Mobile Antenna
COMPACtenna 220MAX Optimized High Performance 222-225 MHz NMO Mobile Antenna is an optimized compact high performance HAM Radio antenna for the 220MHz (1.25m) Band with maximum gain, higher power handling and low SWR. It is completely enclosed into a cylindrical radome Built by popular demand for COMPACtenna to develop the "Ultimate 220 MHz Omnidirectional Antenna" due to the increasing popularity of the 1.25 meter Band. This antenna is a perfect mate the new Alinco DR-CS25 220 MHz Mobile Transceiver and the highly rated Bridgecomm Systems BCM-220 Mobile. COMPACtenna 220MAX provides high performance using a unique Electric-Magnetic Field Diversity design, Patent No. 9,407,001. Superior Omni-directional coverage is achieved far beyond what would be expected for the antenna size. The multi-faceted geometric design of the antenna includes "extended flat monofilar spiral Tesla-like coils" that serve as the LCR matching system, resonating as an integral part of the signal field generation. No external or internal electronic lossy matching components are used. This design establishes diverse electromagnetic fields resulting in signal stability and performance greater than expected in NLOS (Non-Line-Of-Sight) environments, reducing the effects of ionospheric and tropospheric polarization shifts. COMPACtenna 220MAX Specifications: * Frequency Coverage: 222 -225 MHz * Power Rating: 65 W * Duty Cycle, Max. Power: 50%; up to 1 minute transmit limit in a 2-minute period * Height: 9 in. (22.9cm) * Diameter: 1.5 in. (3.8mm) * Mount: NMO * Maximum Ambient Temperature: 130 degrees F (hotter conditions, sun exposure, limited air flow reduces duty cycle) * Gain: +5 dB-MEG: Due to diverse EM fields of the Magnetic Field Resonator, performance is greater than predicted by singular polarization field-range tests * SWR, nominal: < 2.1:1 222-225 MHz. Best SWR when COMPACtenna 220MAX antenna is mounted on an upper corner of a vehicle, NOT center mount. Flat style NMO magnetic mounts provide the best SWR results. SWR varies with size and shape of the vehicle. Also ideal for stealth Base Station operation with the CompacCounterpoise (CAN-COUNTERPOISE)
Not Yet Reviewed
$199.00
COMPACtenna PERFECT 10
COMPACtenna PERFECT 10 is a hand-crafted optimized performance dedicated frequency vertical whip antenna for the 10 meter Amateur band that combines novel engineering with quality machining. Each antenna is precisely tested and tuned in Ohio, USA. This specialized 3/8-24 thread stud mount whip is approximately 65 in. tall and handles 500W RF power. Above the unique horizontal spiral structure, the stainless steel whip can be adjusted for minimum SWR. For mobile applications, strategic positioning of the vertical on the vehicle will affect SWR and performance. A grounded mobile mount near the edge of the vehicle should be used for the best results. The PERFECT 10 may also be used as a base station when mounted well above the ground using a sufficient ground plane. This can be 8 or more feet of metal or radials, horizontal or angled downward, at least 10 ft. away from other metal and antenna. Installation examples include magnet, clamp or bracket mounting on house, shed, or building metal roof (upper area), or a well-supported metal gutter or trim, or a metal railing. Gain: Nominal 7(+) dB-MEG – Mean Effective Gain. COMPACtenna's PERFECT 10 covers diverse EM (Electro-Magnetic) fields, achieving phase diversity in all planes, vertical and orthogonal polarizations-elliptical polarization for significantly improved communications.
( 1 )
$299.00
COMPACTenna SCADA MAX 220 Compact High Performance 1.25-meter VHF Antennas
COMPACTenna SCADA MAX 220 Compact High Performance 1.25-meter VHF Antennas are engineered for reliability in demanding SCADA (Supervisory Control And Data Acquisition) environments, the SCADA MAX 220 delivers exceptional performance in a compact, rugged design. Built and tested in the USA, this advanced antenna is optimized for the 220 MHz (216–222 MHz) 1.25-meter band, making it ideal for modern supervisory control and data acquisition systems. SCADA Systems automate the extraction, monitoring, processing, distribution, recording, and display of data gathered from remote field devices like sensors, factory machines, motors, pumps, valves, and other end devices in asset-heavy environments like industrial enterprises, manufacturing facilities, nuclear power plants, and oil refineries.
Not Yet Reviewed
$249.00