公开(公告)号：US20210306020A1

公开(公告)日：2021-09-30

申请号：US17178700

申请日：2021-02-18

Applicant: Nokia Technologies Oy

Inventor： Senad BULJA ,  Dirk WIEGNER ,  Wolfgang TEMPL ,  Rose KOPF

IPC: H04B1/16 ,  H03H7/21 ,  H04B1/03

Abstract: A radio-frequency switching apparatus that can be used to turn a signal path on or off or to attenuate a radio-frequency signal. The switching apparatus comprises at least one radio-frequency input, at least one radio-frequency output, at least one transmission line providing a signal path between the at least one radio-frequency input and the at least one radio-frequency output, and at least one transition metal oxide portion. The radio-frequency switching apparatus also comprises direct current blocking means electrically coupled between the at least one transition metal portion and the at least one radio-frequency input. The radio-frequency switching apparatus also comprises biasing means for providing a bias across the at least one transition metal oxide portion such that power transferred between the radio-frequency input and the radio-frequency output is controlled by controlling the bias level across the at least one transition metal oxide portion.

公开(公告)号：US20200161759A1

公开(公告)日：2020-05-21

申请号：US16196517

申请日：2018-11-20

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Senad BULJA ,  Rose KOPF ,  Robert CAHILL ,  Majid NOROOZIARAB

IPC: H01Q3/34 ,  H01Q9/04 ,  H01Q21/06 ,  H01Q1/48 ,  H01Q21/00

Abstract: An antenna element includes a patch antenna and a microstrip line separated by an electrochromic material to tune the element. A reflectarray of a plurality of antenna elements is formed on a substrate. The dielectric permitivities of the electrochromic material may be controlled both during manufacture and during operation of the antenna to provide a phase shift to the antenna elements and beamform a signal radiated by the antenna. A bias line may be used to change a shape, direction or circular polarity of a beam radiating from the antenna.