公开(公告)号：US11058487B2

公开(公告)日：2021-07-13

申请号：US15454170

申请日：2017-03-09

Applicant: Wisconsin Alumni Research Foundation

Inventor： Nader Behdad ,  Susan C. Hagness ,  Yahya Mohtashami

IPC: A61B18/18 ,  A61B18/00

Abstract: An antenna system is provided that includes a coaxial cable, an antenna, a reflector wall, and a slot wall. The reflector wall is formed of a conductive material connected to a conductive shield to extend in an axial direction, is separated from an antenna conductor by a second dielectric material in a radial direction relative to the antenna conductor, and partially surrounds the antenna conductor in the radial direction from a first angle to a second angle when projected into a radial plane. The slot wall is formed through a portion of the conductive shield to expose a dielectric material from a third angle to a fourth angle when projected into the radial plane, is formed on a first side relative to a base. The first angle, the second angle, the third angle, and the fourth angle are defined relative to a common axis parallel to the radial plane.

公开(公告)号：US20190207316A1

公开(公告)日：2019-07-04

申请号：US15860943

申请日：2018-01-03

Applicant: Wisconsin Alumni Research Foundation

Inventor： Yahya Mohtashami ,  Nader Behdad ,  Susan C. Hagness

IPC: H01Q9/20 ,  H01Q9/14

Abstract: An antenna includes a first dipole arm and a second dipole arm. The first dipole arm is connected to a first conductor and is formed of a first conducting material. The first dipole arm extends in an axial direction from the first conductor. The second dipole arm is connected to a second conductor that is distinct from the first conductor and is formed of a second conducting material. The second dipole arm extends in the axial direction from the second conductor and is wound around the first dipole arm to form a number of loops. The second dipole arm does not contact the first dipole arm. An axial length of the second dipole arm in the axial direction is less than 90% of an axial length of the first dipole arm in the axial direction.

公开(公告)号：US10707581B2

公开(公告)日：2020-07-07

申请号：US15860943

申请日：2018-01-03

Applicant: Wisconsin Alumni Research Foundation

Inventor： Yahya Mohtashami ,  Nader Behdad ,  Susan C. Hagness

IPC: H01Q9/14 ,  H01Q9/20 ,  H01Q9/18 ,  H01Q11/08 ,  H01Q1/52

Abstract: An antenna includes a first dipole arm and a second dipole arm. The first dipole arm is connected to a first conductor and is formed of a first conducting material. The first dipole arm extends in an axial direction from the first conductor. The second dipole arm is connected to a second conductor that is distinct from the first conductor and is formed of a second conducting material. The second dipole arm extends in the axial direction from the second conductor and is wound around the first dipole arm to form a number of loops. The second dipole arm does not contact the first dipole arm. An axial length of the second dipole arm in the axial direction is less than 90% of an axial length of the first dipole arm in the axial direction.

公开(公告)号：US20180261922A1

公开(公告)日：2018-09-13

申请号：US15454170

申请日：2017-03-09

Applicant: Wisconsin Alumni Research Foundation

Inventor： Nader Behdad ,  Susan C. Hagness ,  Yahya Mohtashami

IPC: H01Q9/04 ,  H01Q15/14 ,  H01Q13/18 ,  H01Q1/40

CPC classification number: A61B18/1815 ,  A61B2018/00577 ,  A61B2018/00785 ,  A61B2018/1853

Abstract: An antenna system is provided that includes a coaxial cable, an antenna, a reflector wall, and a slot wall. The reflector wall is formed of a conductive material connected to a conductive shield to extend in an axial direction, is separated from an antenna conductor by a second dielectric material in a radial direction relative to the antenna conductor, and partially surrounds the antenna conductor in the radial direction from a first angle to a second angle when projected into a radial plane. The slot wall is formed through a portion of the conductive shield to expose a dielectric material from a third angle to a fourth angle when projected into the radial plane, is formed on a first side relative to a base. The first angle, the second angle, the third angle, and the fourth angle are defined relative to a common axis parallel to the radial plane.