Chip-scale radio-frequency localization devices and associated systems and methods
摘要
說明書
External communications module 120 may be of any suitable type and may be configured to communicate according to any suitable wireless protocol(s) including, for example, a Bluetooth communication protocol, an IEEE 802.15.4-based communication protocol (e.g., a “ZigBee” protocol), and/or an IEEE 802.11-based communication protocol (e.g., a “WiFi” protocol).
As shown in
In some embodiments, each of receive antenna 122 and transmit antenna 126 may be a patch antenna, a planar spiral antenna, an antenna comprising a first linearly polarized antenna and a second linearly polarized antenna orthogonally disposed to the first linearly polarized antenna, a MEMS antenna, a dipole antenna, or any other suitable type of antenna configured to receive or transmit RF signals. Each of receive antenna 122 and transmit antenna 126 may be directional or isotropic. Receive antenna 122 and transmit antenna 126 may the same type or different types of antennas. In some embodiments, receive antenna 122 and transmit antenna 126 may be separate antennas. In other embodiments, a target device may include a dual mode antenna operating as a receive antenna in one mode and as a transmit antenna the other mode.
In some embodiments, receive antenna 122 may be configured to receive RF signals circularly polarized in one rotational direction (e.g., clockwise) and the transmit antenna 126 may be configured to transmit RF signals circularly polarized in another rotational direction (e.g., counter-clockwise).
