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The-_Half-Wave_-Term-Means-That-The-Length-Of-This216
 

The-_Half-Wave_-Term-Means-That-The-Length-Of-This216

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    The-_Half-Wave_-Term-Means-That-The-Length-Of-This216 The-_Half-Wave_-Term-Means-That-The-Length-Of-This216 Document Transcript

    • The "half-wave" term means that the length of this dipole antenna is equal to a half-wavelength at the frequency of operation. It is wellknown that the centre of a half wave antennais approximately 73 ohms impedance. That is why the formula for a half wave (in feet) is 492/F while the formula for a half waveantenna is 468/F (assuming a thin conductor).As the conductor is made thicker, the element will need to be even shorter. If the half wave antenna is ground mounted and you have a ground rod, thats where the currents will go. This will give a good SWR but be more loss because of the power being dumped into the dirt.dipole
    • Device antennas are typically designed as quarterwave or halfwave
    • As a rule of thumb, quarterwave antennas require a ground planebut half wave antennas are ground plane independent and do notneed a ground plane to operate
    • However, most M2M antennas show improved performance witha larger ground plane
    • dipole The Delta 9 is a half wave whip antenna with SMA maleconnector
    • The Delta 9 is overmoulded in black engineering plastic offering aUV and weather proof resistance to the half wave whip tuned to433MHz via its SMA male connector
    • Offering a wide frequency range, the Delta 9 is also suitable foroperating between 428 and 438MHz in radio installations capable oftransmitting up to 35 Watts power
    • have been producing and souring antennas and cable assembliesfor over 10 years
    • We supply and Cables globally to many of the worlds leadingorganisations
    • dipole