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Tech Support - Signal Loss in Antenna Cables

    1.37mm Low-Loss Cable for U.FL Connectors

    1.37mm coaxial cable has similar signal loss as RG174 and RG178, but is thinner and more flexible:  It has same size conductor as RG178 cable, but smaller overall diameter.   It's flexibility helps the U.FL cable connectors stay attached, and makes it more suitable than RG174 or RG178 for the tight space of a small case or enclosure.

    Physical characteristics of 1.37mm coaxial cable

    1.37mm coaxial cable is a micro coax with diameter of 1.37mm and American Wire gauge of 30. Its structure is typical of coaxial cable with the following components:

    ●Inner conductor made from silver coated copper with a diameter of 0.32mm.

    ●A clear fluorinated ethylene propylene (FEP) dielectric of 0.30mm thickness which provides electrical insulation as well as thermal and chemical resistance.

    ●A single shielding layer of 16/6 braided tinned copper wire with 96.4% coverage.

    ●A resilient opaque FEP jacket of 0.13mm thickness.

    Electrical properties of 1.37 coaxial cable

    1.37 coaxial cable has an impedance of 50 Ohms which is critical for its many applications. Other features of its electrical profile are:

    ●Conductor resistance of 335 Ohms for every kilometer of length.

    VSWR of 1.3 between 0 and 6 GHz

    ●Capacitance of 95.8pF/M

    This cable has a minimum bend radius of 9mm, and performs. optimally at temperatures between -50 and 200 degrees Celsius (-58 and 392 degrees Fahrenheit).

    Key applications of 1.37mm coaxial cable

    This cable lends itself to a variety of applications particularly wireless networking as it can handle frequencies up to 6 GHZ. It can be used in set-ups for:






    The small form and flexibility of this coax cable lends itself to ultra-minature assemblies such as those of mini PCIs where it can be used for board to board connectivity. 1.37 works with UMCX connectors such as the Hirose UFL connector.

    Attenuation dB/ft



    2500 =2.6




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    RG58 Compared to LMR-200 & LMR-100 Coax: Shielding & Signal Loss

    ATTENUATION dB/ft. Frequency (MHZ) RG58 LMR-200 100 0.048 0.038 200 0.073 0.048 400 0.114 0.068 500 0.125 0.070 900 0.195 0.228 1000 0.213 0.119 1500 0.245 0.129 2400 0.354 0.169 RG58, LMR-100 and LMR-200 all have the following characteristics in common: 50 Ohm impedance A weather-resilient polyethylene (PE) dielectric PVC outer jacket Structural comparison of RG58 and LMR-100 (aside from what is mentioned above): LMR-100 is a 50 Ohm coaxial cable which shares structural and material similarities with RG58, but has an overall lower diameter of 2.79mm (0.110 [...]

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    RG174 compared to LMR-100 Coax : Shielding and Signal Loss

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    U.FL Cables Coax Types Compared: 1.13mm, 1.32mm, 1.37mm, RG174, RG178

    1.13mm coaxial cable is the most commonly-used coax for U.FL cables - especially short cables.  1.13 is the only coax that can be used with MHF4 cables. When connecting U.FL connector to a jack on a miniPCI card or board, sometimes the tight space requires the use of 1.13mm cable, because it is very thin and [...]

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    LMR-200 cable specifications / characteristics

    LMR-200 "Low loss cable" differs from RG58 and other coax standards by double shielding and less attenuation (signal loss in the cable) than the standard cables (e.g. RG58).  LMR-200 is equivalent or better quality compared to LMR-200 (generally better because LMR-200 is double-shielded). Rated for outdoor use and are also suitable for indoor use. very flexible/easily bendable coax The [...]

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    Double Shielding of Antenna Cables for Low Signal Loss

    Interference and Cable Shielding Shielding protects against both leakage and absorption of stray radiation of electrical noise by cables. Electrical "signal noise" interferes with the operation of antennas and antenna cables. Cables carrying high frequency charge naturally pose the risk of EMI transfer - both from shedding interference as well as accepting it. While insulation protects antenna cables from physical [...]

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    LMR-400 Coax Specifications / Characteristics: Lowest Signal Loss in Its Class

    Structure: LMR-400 is a 50-ohm coaxial cable that was originally made to replace lower quality coax cables such as the RG-8. The 400 represents the cable diameter. The LMR-400 actually has a diameter of 0.405 or 10.29 mm though it is classified as a 400, similar to most coaxial cables in its class such as [...]

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    CLF-100 Coax Specifications / Characteristics. Comparison to LMR-100

    CLF-100 and LMR-100 have the same structure and shielding CLF-100 "Low loss cable" differs from RG174 and other coax standards by double shielding and the resulting less attenuation (signal loss in the cable) than RG174 and RG178.  CLF-100 is equivalent or better quality compared to LMR-100. Applications: Suitable for all frequency bands between 0 and 18GHz: [...]

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    Signal Loss (Attenuation) in LMR-100 & LMR-200 Cables Five to Ten Feet in Length

    Six feet is not too long for the LMR-100 and LMR-100-equivalent cable that we use for shorter antenna cables.  However, it is right at the threshold at which we would recommend that you consider the thicker cable.    This comparison shows that the expenditure for the thicker cable, which is about 25% higher cost, is proportional [...]

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    U.FL & MHF4 Antenna Cables: Thickness of Cable & other Key Considerations

    Data Alliance offers three options of thickness of the coaxial cable for U.FL cables:  1.13mm, 1.32mm and RG174:   All three have a black jacket.  All three are RoHS and REACH compliant. All three are impedance-matched to 50 Ohm antennas and antenna cables, and compatible with frequency bands from 0GHz to 11GHz - therefore compatible with almost all typical wireless applications.  MHF4 cables [...]

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    Antennas by connector type Signal Loss in Antenna Cables.  LMR-100, LMR-200, LMR-400 Frequency Bands of WiFi, Bluetooth, 5G, 4G, 3G, LTE, GSM, ISM, CDMA

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