Abstract: A system for receiving data from the nano-elements inside the body or on the body is provided, including a molecular communication unit. The molecular communication unit includes an antenna to be attached to the body or on the body in order to transfer the data from the inside of the body to the outside of the body and an antenna body configured to change and reflect an electromagnetic signal when the antenna is subjected to electromagnetic signal, and the antenna body includes a re-shapeable part made of a material which changes in form when it is subjected to a factor inside the body. A system for sending data to nano-elements is also provided.

Abstract: In an embodiment, an antenna is disclosed. The antenna comprises: a substrate of dielectric material, the substrate being substantially planar and defining a first surface and a second surface opposed to the first surface; an electrically conductive ground plane on the first surface, the ground plane defining a slot; a first feed line configured to receive a first input signal having a frequency within an operating frequency range, the first feed line extending over the slot on the second surface in a first direction by a length of between 0.3 and 0.

Abstract: A relay device (201) is described for relaying radio frequency signals received from an antenna implanted within a patient's body to another device located outside the patient's body, the relay device comprising a first slot antenna for detecting radio frequency signals sent from the antenna implanted within the patient's body and a second slot antenna for transmitting radio frequency signals to the other device located outside the patient's body, whereby the first and second slot antennas comprise elongated slots (209, 211) on opposite sides of a cavity (203). The signals to be transmitted by the second slot antenna are to be used to relay information conveyed by the signals detected by the first slot antenna. The relay device also comprises switching means (215, 217) for switching the first and second slot antennas between active and inactive configurations.

Abstract: A relay device (201) is described for relaying radio frequency signals received from an antenna implanted within a patient's body to another device located outside the patient's body, the relay device comprising a first slot antenna for detecting radio frequency signals sent from the antenna implanted within the patient's body and a second slot antenna for transmitting radio frequency signals to the other device located outside the patient's body, whereby the first and second slot antennas comprise elongated slots (209, 211) on opposite sides of a cavity (203). The signals to be transmitted by the second slot antenna are to be used to relay information conveyed by the signals detected by the first slot antenna. The relay device also comprises switching means (215, 217) for switching the first and second slot antennas between active and inactive configurations.

Abstract: A cavity backed slot antenna that comprises at least two internal volume defining walls that define an internal volume and at least two further walls that are located opposite to the internal volume defining walls across the cavity and that project into the internal volume so that an outer surface created by the at least two further walls is located such that at least part of the internal volume is at an outside of the outer walls. At least two internal volume defining walls comprise a resonant slot.

Abstract: An orthopaedic implant comprising: a body portion for replacing a missing joint or bone, or for supporting a joint or bone within a patient's body; a slot antenna for effecting wireless communication between the implant and an external device, wherein the slot antenna comprises a first surface in which is arranged a slot for receiving and/or transmitting wireless communication signals; wherein the slot antenna is comprised within the body portion, such that the slot is exposed to the environment outside of the implant.

Abstract: In an embodiment, an antenna (10) comprises a planar patch radiator having a first excitation point (21) and a second excitation point (22); a ground plane (14); and a feed line (30) configured to couple an input signal to the first excitation point and the second excitation point such that the relative phase between the input signal at the first excitation point and the input signal at the second excitation point is switchable between a first relative phase and a second relative phase and the antenna radiates in a first mode in response to the first relative phase and the antenna radiates in a second mode in response to the second relative phase.

Abstract: In an embodiment a method of manufacturing an antenna is disclosed. The method comprises selecting an operating frequency range; identifying a first radiation mode and a second radiation mode of a radiator; determining a configuration of the radiator in which a first frequency within the operating frequency range excites the first radiation mode and a second frequency within the operating frequency range excites the second radiation mode; and making an antenna having a radiator according to the determined configuration.

Abstract: In an embodiment an antenna comprising a planar patch radiator is disclosed. The planar patch radiator, on excitation by an input signal having a first frequency within a predetermined frequency range, is operable in a first radiation mode with a first radiation pattern. On excitation by an input signal having a second frequency within the frequency range the planar patch radiator is operable in a second radiation mode with a second radiation pattern.

Abstract: In one embodiment, a method, in a wireless network, of transmitting a sequence of bits of information from an array of antennas, the array of antennas comprising a plurality of antennas, each antenna of the plurality of antennas having a plurality of feed points, comprises selecting an antenna and at least one feed point of the plurality of feed points for the selected antenna from a plurality of combinations of antenna and at least one feed point to indicate at least part of the sequence of bits; and transmitting a signal from the selected antenna by driving the selected at least one feed point.

Abstract: In one embodiment, a method, in a wireless network, of transmitting a sequence of bits of information from an array of antennas, the array of antennas comprising a plurality of antennas, each antenna of the plurality of antennas having a plurality of feed points, comprises selecting an antenna and at least one feed point of the plurality of feed points for the selected antenna from a plurality of combinations of antenna and at least one feed point to indicate at least part of the sequence of bits; and transmitting a signal from the selected antenna by driving the selected at least one feed point.