Omni Directional Antennas

  • The EM-6863 High Gain Omni-Directional Antenna is a vertical collinear array for use in the 824 to 960 MHz frequency range. It achieves high gain while maintaining an excellent omni-directional character by concentrating the elevation pattern on the horizon and reducing radiation at higher angles. It is ruggedly constructed and may be easily disassembled in the field without tools for convenient storage and transport.

    Specifications

    Electrical

    Frequency Range: 824 MHz - 960 MHz Gain, nominal: 6.0 dB VSWR: 1.8: 1, typical Polarization: Vertical Power Handling: 25 Watts Connector: Type N

    Mechanical

    Height, deployed: 1.0m (38.8”) Stowed Length: 46 cm (18”) Weight: 0.5 kg (1.1 lb.)

    Product Sheet
  • The EM-6851 Omni-Directional Wideband Antenna is capable of operating as either a transmitting or receiving antenna over the 2 to 18 GHz frequency range. This antenna provides a 45% size reduction when compared to similarly performing models. The antenna is enclosed in a weather resistant radome. The length of the support rod allows a microwave amplifier to be connected directly to the output connector, reducing the potential signal loss compared to an amplifier connected at a more distant point.

    Specifications

    Electrical

    Frequency Range: 2 GHz - 18 GHz Polarization: Vertical Output Impedance: 50 Ohms, nominal VSWR, average: < 2:1 typical Gain: 0 to +5 dBi Connector: Type SMA (Female) Continuous Power: 5 W

    Mechanical

    Diameter: 10.16 cm (4”) Height, Shield Tube: 4.90 cm (1 15/16”) Overall Height: 33.0 cm (13”) (Antenna & Support Rod) Weight: 0.46 kg (1 lb.) Rod Mounting: Standard ¼ - 20 Thread Antenna Mounting: Mate to #8-32 Stud

    Product Sheet
    Instruction Manual
  • The EM-6855 Omni-Directional Wideband Antenna is capable of operating as either a transmitting or receiving antenna over the 4.5 to 40 GHz frequency range.

    An omni-directional antenna is an antenna which radiates power (or intercepts electromagnetic fields) uniformly in one plane, with a directive pattern shape in a perpendicular plane. The EM- 6855 omni-directional antenna is a vertically polarized antenna, and exhibits a 360 degree pattern in the horizontal plane.

    Directivity and gain are directly related in antennas. The directivity of an antenna is a statement of how the of RF energy is focused. An omni-directional antenna and a directional antenna such as a horn, having the same amount of RF energy at the connector yield different fields. From a transmission point of view, the energy radiated by the omni directional antenna is distributed over a large area, whereas the same energy is concentrated into a smaller area by the directional antenna.

    The signal strength measured at a given distance from an omni -directional antenna versus that measured in the beam of a directional antenna is lower. This lower signal level corresponds to the lower gains exhibited by omnidirectional antennas.

    The EM-6855 antenna is enclosed in a weather resistant radome. A 25.4 cm (10”) support rod provides a means for mounting the antenna to the ElectroMetrics Model EM-6134 Tripod. A threaded ¼ - 20 female connector is located at the end of the rod.

    Specifications

    Electrical

    Frequency Range: 4.5 GHz - 40 GHz Polarization: Vertical Output Impedance: 50 Ohms, nominal VSWR, typical: < 1.7:1 VSWR worst case: < 2.0:1 Average Gain: 0 dBi, typical Connector: Type K, female Continuous Power: 20 Watts

    Mechanical

    Diameter: 5.72 cm (2.25") Height: 5.72 cm (2.25”) Weight: 0.114 kg (0.25 lb.) Mounting: (2) #8-32 tpi mounting studs

    Product Sheet
    Instruction Manual
  • The EM-6855-1 Omni-Directional Wideband Antenna is capable of operating as either a transmitting or receiving antenna over the 4.5 to 40 GHz frequency range.

    An omni-directional antenna is an antenna which radiates power (or intercepts electromagnetic fields) uniformly in one plane, with a directive pattern shape in a perpendicular plane. The EM-6855-1 omni-directional antenna is a vertically polarized antenna, and exhibits a 360 degree pattern in the horizontal plane.

    Directivity and gain are directly related in antennas. The directivity of an antenna is a statement of how the of RF energy is focused. An omni-directional antenna and a directional antenna such as a horn, having the same amount of RF energy at the connector yield different fields. From a transmission point of view, the energy radiated by the omni directional antenna is distributed over a large area, whereas the same energy is concentrated into a smaller area by the directional antenna.

    The signal strength measured at a given distance from an omni -directional antenna versus that measured in the beam of a directional antenna is lower. This lower signal level corresponds to the lower gains exhibited by omnidirectional antennas.

    The EM-6855-1 antenna is enclosed in a weather resistant radome. A 25.4 cm (10”) support rod provides a means for mounting the antenna to the ElectroMetrics Model EM-6134 Tripod. A threaded ¼ - 20 female connector is located at the end of the rod.

    Specifications

    Electrical

    Frequency Range: 4.5 GHz - 40 GHz Polarization: Vertical Output Impedance: 50 Ohms, nominal VSWR, typical: < 1.7:1 VSWR worst case: < 2.0:1 Average Gain: 0 dBi, typical Connector: Type K, female Continuous Power: 20 Watts

    Mechanical

    Diameter: 5.72 cm (2.25") Height: 5.72 cm (2.25”) Weight: 0.114 kg (0.25 lb.) Mounting: (2) #8-32 tpi mounting studs

    Product Sheet
  • The EM-6172 Omni-Directional, Linearly polarized, Super-Wideband Antenna is capable of operating as either a transmitting or receiving antenna over the 20 MHz to 23 GHz frequency range. The antenna is enclosed in a flat, weather resistant radome, for indoor or outdoor use. The antenna covers this large frequency range with 3 distinct elements, the outputs terminating in SMA female connectors. Recess-mounted into one of the antenna panel edges, the connectors are hidden from frontal view to improve appearance and minimize the possibility of tampering.

    Specifications

    Electrical

    Frequency Range: 20 MHz - 23GHz Impedance: 50 Ohms, nominal VSWR: ≤ 2:1 over 98 % of the frequency range Gain: -45 dBi, typical @20 MHz -24 dBi typical @ 80 MHz -5 dBi typical @ 200 MHz >-5 dBi typical 200 MHz to 23 GHz Connectors: Type SMA female Continuous Power: 5 W

    Mechanical

    Length: 35.6 cm (14 ") Width: 55.88 cm (22") Thickness: 3.18 cm (1.25”) Weight: 1.14 kg (2.5 lb.)

    Product Sheet
    Instruction Manual
  • The EM-6860 Omni Wideband Antenna is a vertically polarized broadband antenna designed to operate from 60 MHz to 1 GHz and is intended for Spectrum monitoring. The antenna utilizes a passive filter plus an amplifier circuit for increased gain over the entire bandwidth.

    The antenna amplifier has a minimum gain of 9.5 dB and uses a coaxial transfer switch to connect power to the amplifier. The switch also switches the signal either through the RF amplifier or, when the input power is removed, the normally closed contacts on the switch connect the signal directly to the output connector. The "fail safe" feature allows the antenna circuitry to provide passive reception in a power off condition. An eleven-element high pass filter (cutoff frequency = 60 MHz) yields 60 dB rejection at 40 MHz.

    The EM-6860 is constructed of precision machine aluminum with a G-10 fiberglass cylindrical housing.

    Specifications

    Electrical

    Frequency Range: 60 MHz - 1 GHz Polarization: Vertical Output Impedance: 50 Ohms Operating Modes: Passive Active Fail Safe Mode: Passive Gain (minimum): 9.5 dBi Active Consumption: 25 W @ 115 VAC, 60 Hz Passive Dipole Gain: 60 MHz: -40 dBi (minimum) 100 MHz: -17 dBi (minimum) 1000 MHz: 0 dBi (minimum)

    Electrical Continued

    High Pass Filter: 11 elements Cutoff Frequency: 60 MHz Rejection @ 40 MHz: 40 dB (minimum) Connector: Type N Power Connector: MS3102E-10SL-3P

    Mechanical

    Diameter: 20.7 cm (8.15") Height: 69.85 cm (27.5") Weight: 5.44 kg (12 lbs.)

    Product Sheet
  • The EM-6865 Omni-Directional Wideband Antenna is capable of operating as either a transmitting or receiving antenna over the 2 to 18 GHz frequency range.

    The EM-6865 consists of two-brass conical elements connected point-topoint to form a hourglass shaped antenna element. The center conductor of a rigid coaxial cable is connected to the upper cone, while the shield is connected to the lower cone. The cable connects to a Type “N” (female) connector fastened to a phenolic base plate.

    A 25.4 cm (10”) support rod provides a means for mounting the antenna to any tripod with a 1/4-20 mount.

    The length of the support rod allows a microwave amplifier to be connected directly to the output connector of the antenna, reducing the potential signal loss compared to an amplifier connected at another point in the signal path.

    Specifications

    Electrical

    Frequency Range: 2 GHz – 18 GHz Polarization: Vertical Output Impedance: 50 Ohms, nominal VSWR, average: < 2:1 Gain: 0 dBi, typical Connector: Type N, female Continuous Power: 5 W

    Mechanical

    Diameter: 10.16 cm (4") Length, Support Rod: 25.4 cm (10") Height, Shield Tube: 7.62 cm (3”) Overall Height: 33.0 cm (13”) (Antenna & Support Rod) Weight: .45 kg (1 lb.) Mounting: Standard ¼ - 20 Thread

    Product Sheet
    Instruction Manual
  • The EM-6865A Omni-Directional Wideband Antenna is capable of operating as either a transmitting or receiving antenna over the 2 to 18 GHz frequency range. The antenna is enclosed in a weather resistant radome, and is a ruggedized version of EM-6865. The redesigned mounting fixture provides an easy means to mount to roof-racks or other rails or surfaces.

    Specifications

    Electrical

    Frequency Range: 2 GHz - 18 GHz Impedance: 50 Ohms, nominal VSWR, average: <2:1 Gain: 0 dBi, typical Connector: N-type, female Continuous Power: 5 W

    Mechanical

    Length: 6.03 cm (2 3/8") Diameter: 11.11 cm (4 3/8") Weight: .28 kg (.61 lb.) Mounting: Standard 8-32 thread x2

    Product Sheet
    Instruction Manual
  • The Electro-Metrics Corporation EM-6853 Ultra-Wideband Passive Omni-Directional Antenna has a broadband frequency coverage from below 300 MHz to well above 40 GHz.

    With nominal gains of 0 dBi or higher over 99.5% of the antenna coverage frequency range, this antenna is the perfect device for receiving, monitoring, SIGINT, or any other application where a small, rugged, high performance passive ceiling mount antenna is required.

    Specifications

    Electrical

    Frequency Range: 300 MHz – 40 GHz Beam-width: Omni-directional Impedance: 50 Ohms, Nominal Gain: 700 MHz - 40 GHz Nominal 0dBi or Greater @ 100 MHz Nominal –40 dBi @ 300 MHz Nominal –7 dBi Connector: Type K

    Mechanical

    Overall Height: 12.7cm (5”) (with connector) Diameter: 20.3 cm (8”)

    Product Sheet
    Instruction Manual
  • The Electro-Metrics EM-6857 Ultra-Wideband Passive Omni-Directional Antenna has an amazing frequency coverage from below 20 MHz to well above 40 GHz.

    With nominal gains of 0 dBi or higher over 99.5% of the antenna coverage frequency range, this antenna is the perfect device for SIGINT or any other application where a small, rugged, high performance passive antenna is required.

    Specifications

    Electrical

    Frequency Range: 20 MHz – 40 GHz Beam-width: Omni-directional Impedance: 50 Ohms, Nominal Gain: 200 MHz - 40 GHz Nominal 0dBi or Greater @ 100 MHz Nominal –17 dBi @ 20 MHz Nominal –40 dBi Connector: Type 'k' (2.92 mm)

    Mechanical

    Overall Length: 44.5 cm (17.5”) With standard tripod mount: 58 cm (22.5”) Diameter: 11.5 cm (4.5”) Weight: 1.3kg ( 2.8 lbs ) Temperaure Ranges: Operating: -20C to +50C Storage: -30C to +75C

    Product Sheet
    Instruction Manual
  • The EM-6117 Vertical Collinear Antenna is a free space antenna that requires no ground plane. The antenna maintains an Omni directional pattern in the horizontal plane. The antenna is optimized for use in a variety of wireless systems. Some examples are WLAN, Video, PCS/PCN.

    The optional antenna reflector Kit shapes the beam into a cardioid shape increasing gain and directivity.

    Specifications

    Electrical

    Frequency Range: 1.75 GHz -1.85 GHz Gain: 6 dBi Bandwidth @ <2:1 VSWR: 100 MHz Impedance: 50 Ohms Maximum Power Input: 100 W Connector: Type N female

    Mechanical

    Length: 59.0 cm (23.25”) Width: 3.8 cm wide (1.5 ”) With optional reflector: 5.97 cm (2 3/8”) Weight: 366G (0.8 lbs)

    Product Sheet
  • The EM-6116 is a vertically polarized, omnidirectional antenna covering the frequency range 2 to 10 GHz. It is enclosed in a weather resistant radome. Smaller than other similar antennas, the EM-6116 is ideal for covert applications.

    Specifications

    Electrical

    Frequency Range: 2 GHz to 10 GHz Gain, nominal: +1 dBi Deviation from Omni: ±1 dB VSWR: 2.0:1, maximum Impedance: 50 Ohms Power Handling: 25 W Connector: Type N, female

    Mechanical

    Length: 8.5 cm (3.35”) Length Over Connector: 10.4 cm (4.1”) Diameter: 5.1 cm (2.0”) Weight: 204 g (7.2 oz.)

    Product Sheet
    INSTRUCTION MANUAL
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