Pie shape phased array antenna design
View Patent ↗A radially segmented antenna design is described. In an embodiment, the radially segmented antenna is formed from multiple patches which are arranged in a ring around the central point of the radially segmented antenna. Each patch is shaped to form a segment of the ring and is separated from the two adjacent patches. In operation, alternate patches in the ring may be used for transmitting and the remaining patches may be terminated in an open circuit or may be used for receiving. Alternatively, all the patches in the ring may be used for transmitting or receiving. In some examples, there may be more than one concentric ring of patches within the radially segmented antenna and the additional rings may be located on the same face of the antenna as the first ring of patches, or on the opposite face of the antenna.
1. A radially segmented antenna comprising a first plurality of patches arranged in a ring around a central point and wherein each patch forms a segment of the ring and is spaced from two adjacent patches in the ring, wherein, in use, alternate patches are arranged to transmit signals and non-transmitting patches are terminated into an open circuit.
2. A radially segmented antenna according to claim 1 , further comprising a central circular area centered on the central point and wherein each patch does not extend into the central circular area.
3. A radially segmented antenna according to claim 2 , wherein each patch comprises two straight sides and two arcuate sides and wherein the arcuate sides are arranged between the two straight sides.
4. A radially segmented antenna according to claim 2 , further comprising a chip mounted within the central circular area and a plurality of feed lines connecting the chip to at least a subset of the patches.
5. A radially segmented antenna according to claim 1 , wherein each patch is symmetrical about a line extending radially from the central point which bisects the patch.
6. A radially segmented antenna according to claim 1 , wherein each patch tapers towards the central point.
7. A radially segmented antenna according to claim 1 , further comprising a feed point for each patch, the feed point for a patch being positioned within the patch towards the central point.
8. A radially segmented antenna according to claim 7 , wherein the feed point for a patch is positioned on a line extending radially from the central point which bisects the patch.
9. A radially segmented antenna comprising a first plurality of patches arranged in a ring around a central point and wherein each patch forms a segment of the ring and is spaced from two adjacent patches in the ring, and according to claim 1 , further comprising a second plurality of patches arranged in a second, concentric, ring around the central point and wherein each patch in the second plurality of patches forms a segment of the second ring and is spaced from two adjacent patches in the second ring.
10. A radially segmented antenna according to claim 9 , wherein each of the patches in the first plurality of patches is of a first area and each of the patches in the second plurality of patches is of a second area, and wherein the first and second areas are different sizes.
11. A radially segmented antenna according to claim 9 , wherein the first and second pluralities of patches comprise different numbers of patches.
12. A radially segmented antenna according to claim 1 , wherein the antenna is circular in form.
13. A radially segmented antenna according to claim 1 , wherein the antenna is hexagonal in form.