公开(公告)号：US10103433B2

公开(公告)日：2018-10-16

申请号：US15134444

申请日：2016-04-21

Applicant: Maxtena, Inc.

Inventor： Carlo DiNallo ,  Nathan Cummings ,  Stanislav Licul ,  Simone Paulotto

IPC: H04B7/185 ,  H01Q3/00 ,  H01Q3/36 ,  H01Q1/28 ,  H01Q3/26 ,  H01Q11/08 ,  H01Q3/28

Abstract: A phased array antenna for an earth terminal for a low earth orbit satellite communication system. The phased array antenna includes a set of Quadrafilar Helical Antenna's (QHAs) elements that produce a peak directivity far off-axis which partially compensates for the angular dependence of satellite systems gain which peaks at relatively lower angle. To attain the desired angular dependence of the gain and operability at high zenith angles, the QHAs are preferably spaced apart by a distance between 0.4λ and 0.45λ, includes filaments that have a helical pitch angle α of between 62° and 84°.

公开(公告)号：US10038235B2

公开(公告)日：2018-07-31

申请号：US14197166

申请日：2014-03-04

Applicant: Maxtena, Inc.

Inventor： Carlo DiNallo ,  Simone Paulotto ,  Nathan Cummings

IPC: H01Q1/36 ,  H01Q5/357 ,  H01Q5/35 ,  H01Q11/08 ,  H01Q21/30

CPC classification number: H01Q1/362 ,  H01Q5/35 ,  H01Q5/357 ,  H01Q11/08 ,  H01Q21/30

Abstract: A multi-mode, multi-band antenna system for a handheld wireless device includes a Quadrafilar Helix Antenna (QHA) that radiates circularly polarized waves is fed by a co-axial cable. The co-axial cable is also used in combination with the QHA as a monopole antenna. Because of the distinct electromagnetic field patterns of the QHA versus the combination of the QHA and the co-axial cable operating as a monopole antenna, the cross coupling between the two modes is low. In certain embodiments the co-axial cable can itself be formed into a helix in order to reduce the physical length of the antenna system while maintaining an electrical length desired to supported certain frequency bands in the monopole mode. According to certain embodiments a post which also serves to increase the effective electric length of the co-axial cable and thereby support a lower frequency band is provided along the centerline of the QHA.

公开(公告)号：US09742064B2

公开(公告)日：2017-08-22

申请号：US14936247

申请日：2015-11-09

Applicant: Maxtena, Inc.

Inventor： Simone Paulotto

IPC: H01Q1/36 ,  H01Q5/371 ,  H01Q5/392 ,  H01Q1/48 ,  H01Q9/04

CPC classification number: H01Q5/371 ,  H01Q1/48 ,  H01Q5/392 ,  H01Q9/0407 ,  H01Q9/0421

Abstract: A low height, space efficient, dual band monopole antenna is provided. The antenna includes a first conductive post, a second conductive post and a third conductive post extending between a lower oblong shaped PCB and an upper oblong shaped PCB. A signal is applied to a bottom end of a first conductive post and bottom ends of the remaining two posts are coupled to ground. The top of the first post is connected to the tops of the second and third posts by a serpentine trace which in one embodiment is symmetric and in another embodiment is asymmetric. The asymmetric embodiment achieves improved dual band operation without the need for an impedance matching network.