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7dB Colinear antenna
Building a colinear antenna for VHF 145MHz, and having about 10dBmore gain than that little 1/4-wave magmount I have not used for 6 years. The actual gain of this antenna is +7.5dBd
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Definition of Collinear antenna array
Collinear arrays of dipoles are high gain omnidirectional antennas. A dipole has an omnidirectional radiation pattern in free space when oriented vertically; it radiates equal radio power in all azimuthal directions perpendicular to the antenna, with the signal strength dropping to zero on the antenna axis
Definition of Collinear antenna arrayThe antenna structure recalls the use of Franklin's principle in linking several radiating dipoles to sum up all radiations' intensities
Home-brew Compact 6dBi Collinear Antenna
This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking. The antenna is very robust and compact, and has a gain of approximately 5-6dBi
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Collinear arrays of dipoles are high gain omnidirectional antennas. A dipole has an omnidirectional radiation pattern in free space when oriented vertically; it radiates equal radio power in all azimuthal directions perpendicular to the antenna, with the signal strength dropping to zero on the antenna axis
This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking. The antenna is very robust and compact, and has a gain of approximately 5-6dBi
Linear loaded short dipole 21Mhz For my amateur radio activities on the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Atu balanced feeder antenna system An ATU has the advantage of bringing the feeder-antenna system to resonance, act as a band pass filter both on receive and transmit and a low SWR