en:antennas
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en:antennas [2019/04/21 14:51] – [Plastic 1/4 lambda GroundPlane] fluktuacia | en:antennas [2019/04/21 14:56] – [Other types of antennas] fluktuacia | ||
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===== Patch antenna with a circular polarisation ===== | ===== Patch antenna with a circular polarisation ===== | ||
- | This antenna was designed to improve the gain of the receiving system compared to a currently used GroundPlane antenna. Patch antenna does not have the zero in zenith and has an almost hemispherical radiation characteristics - that is why it is also sensitive to signals from objects flying directly over the observation site. Symmetric shape of radiation pattern (?? vyzařovací charakteristika) is also suitable for phase antennae fields, where there is necessary to optimise the sensitivity of antennae system for a specific type of observation. | + | This antenna was designed to improve the gain of the receiving system compared to a currently used GroundPlane antenna. Patch antenna does not have the zero in zenith and has an almost hemispherical radiation characteristics - that is why it is also sensitive to signals from objects flying directly over an observation site. Symmetric shape of its radiation pattern (?? vyzařovací charakteristika) is also suitable for phase antennae fields, where there is necessary to optimise the sensitivity of antennae system for a specific type of observation. |
The following photos show the first build functional sample of a new patch antenna. | The following photos show the first build functional sample of a new patch antenna. | ||
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+ | The functional sample underwent a measurement | ||
Na funkčním vzorku bylo měřeno přizpůsobení můstkovou metodou. (??) | Na funkčním vzorku bylo měřeno přizpůsobení můstkovou metodou. (??) | ||
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* A way how to place a preamplifier is not solved | * A way how to place a preamplifier is not solved | ||
- | * The constructions is difficult to be implemented (e.g. it needs to even out a coiled mesh) | + | * The constructions is difficult to be implemented (e.g. it involves evening |
* It is not mechanically stable | * It is not mechanically stable | ||
* A way how to tune the antenna is not yet resolved | * A way how to tune the antenna is not yet resolved | ||
- | Patch type antennae with a circular polarisation are difficult to manufacture, | + | Patch type antennae with a circular polarisation are difficult to manufacture, |
===== Other types of antennas ===== | ===== Other types of antennas ===== | ||
- | An interesting antenna design, that should solve the drawbacks of GP antennas is so-called [[http:// | + | An interesting antenna design, that should solve the drawbacks of GP antennas is a so-called [[http:// |
- | A pair of crossed dipoles above a conducting plane could also result in interesting experimental solutions as it would be probably possible to integrate | + | A pair of crossed dipoles above a conducting plane could also result in interesting experimental solutions as it would be probably possible to integrate |
- | [[http:// | + | [[http:// |
en/antennas.txt · Last modified: 2019/07/13 12:27 by fluktuacia