The present concept a helical antenna boom assembly includes a boom assembly, including a boom, and a plurality of rods and stays, each rod operably attached at an upper end of the boom and connected to one end of the stay. The boom assembly includes dish arms operably attached at a lower end of the
The present concept a helical antenna boom assembly includes a boom assembly, including a boom, and a plurality of rods and stays, each rod operably attached at an upper end of the boom and connected to one end of the stay. The boom assembly includes dish arms operably attached at a lower end of the boom, each dish arm connected to the other end of the stay, wherein the boom assembly moveable between an extended position, and a boom assembly collapsed position, such that in the extended position the stays are held under tension between the dish arms and the rods. The stays are also attached to a helical coil such that the tensioned stays support the helical coil in its correct helical geometry.
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1. A helical antenna boom assembly comprising: a) a boom assembly, including a boom, and a plurality of resilient rods and stays, the rods arranged in a circular inverted conical array, wherein a boom end of each rod is operably attached at an upper end of the boom at a central rod holder and a stay
1. A helical antenna boom assembly comprising: a) a boom assembly, including a boom, and a plurality of resilient rods and stays, the rods arranged in a circular inverted conical array, wherein a boom end of each rod is operably attached at an upper end of the boom at a central rod holder and a stay end of the rods are connected to a rod end of the stays, thereby the rods support the stays in a circular arrangement around the boom;b) the boom assembly includes dish arms arranged in a circular array around a lower end of the boom and operably attached at a lower end of the boom, each dish arm connected to a dish end of the stay,c) wherein the boom assembly is moveable between an extended position, and a boom assembly collapsed position,d) such that in the extended position the rods are resiliently biased such that the stays are held under tension between the circular array of dish arms and the circular array of rods,e) wherein a flexible conductor helical coil is attached to the stays such that the tensioned stays support the helical coil in its correct helical geometry. 2. The helical antenna boom claimed in claim 1, wherein the boom assembly including a cylindrical rod holder mounted to the upper end of the boom, for connecting the rods to the boom and holding the rods in the circular inverted conical array, wherein each rod extends above an upper end of the boom. 3. The helical antenna boom claimed in claim 2, wherein the boom assembly including a hub assembly mounted to the lower end of the boom, wherein the dish arms are attached at one end to the hub assembly and attached at the other end to the stays. 4. The helical antenna boom claimed in claim 3, wherein the dish arms include arm pinions for pivotally engaging with a cylindrical gear profiled rack which is slidably mounted to the boom, such that all of the dish arms are pivotally connected to the cylindrical gear profiled rack for operatively moving the dish arms from an extended position to an arms collapsed position by manually urging any one of the arms into the desired position which simultaneously moves all of the dish arms in unison to the selected position. 5. The helical antenna boom claimed in claim 4, wherein the cylindrical gear profiled rack includes a ball groove and co-operating lock balls, the rack slidably engages axially along a boom support shaft portion of the boom such that in the extended position the rack is in an upper locked position wherein the lock balls register with the ball groove in the rack for holding the rack stationary and thereby maintaining the dish arms in the extended position. 6. The helical antenna boom claimed in claim 5, wherein the hub assembly further includes an ejector pin slideably received within the support shaft portion of the boom, the ejector pin biased in a normally locked position which maintains the lock balls in engagement with the ball groove in the rack thereby holding the rack stationary and maintaining the dish arms in the extended position. 7. The helical antenna boom claimed in claim 6, wherein the ejector pin is moveable from a locked position to an unlocked position by urging the ejector pin downwardly thereby releasing the lock balls which in turn allows the rack to slide downwardly along the support shaft portion of the boom and thereby allowing the dish arms to retract to an arms collapsed position. 8. The helical antenna boom claimed in claim 1, wherein the rods are made of resiliently flexible material thereby tensioning the stays and maintaining linear extension of the stays. 9. The helical antenna boom claimed in claim 1, wherein the boom includes nested telescoping sections such that the boom is moveable between a boom extended position and a boom collapsed position. 10. The helical antenna boom claimed in claim 1, wherein the boom includes an upper segment and a telescopically cooperating lower segment such that the upper segment slides into the lower segment to put the boom in the boom collapsed position. 11. The helical antenna boom claimed in claim 1, further includes a coupling for locking the upper segment to the lower segment when the upper section is urged into the boom extended position. 12. The helical antenna boom claimed in claim 1, wherein the boom is made of nested telescoping sections such that the boom is moveable between a boom extended position and a boom collapsed position. 13. The helical antenna boom claimed in claim 1, wherein the boom is made of a tubular section. 14. The helical antenna boom claimed in claim 7, wherein the ejector pin includes a key ring for manually urging the ejector pin downward thereby unlocking the rack and allowing the rack and dish arms to be urged into the arms collapsed position.
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