An electromagnetic device includes: a substrate comprising an elongated aperture having an overall length, L, and an overall width, W, as observed in a plan view of the device, where L is greater than W; a dielectric medium comprising a dielectric material other than air disposed on the substrate substantially covering the aperture, the dielectric medium having a cross sectional boundary, as viewed in the plan view of the device, that is symmetrical with respect to an in-plane axis of reflection of the dielectric medium; wherein the device is configured such that a line perpendicular to the overall length L of the elongated aperture and passing through a center point of the elongated aperture is not any in-plane axis of reflection.

An electronic device may be provided with a phased antenna array having a bent dielectric resonating element. The bent dielectric resonating element may have a first segment, a second segment nonparallel to the first segment, and an angled surface that couples the first segment to the second segment. One or more feed probes may be coupled to the first segment to excite the dielectric resonating element. A reflector may be provided on the angled surface to direct electromagnetic energy from the first segment to the second segment and vice versa. The bent dielectric resonating element may exhibit less overall height than dielectric resonators having straight columns of dielectric material, thereby allowing for a reduction in the thickness of the electronic device. The angled surface and the reflector may optimize the radio-frequency performance of the antenna despite the reduction in overall height.

A system comprising synchronization circuitry, a first interrogator, and a second interrogator. The first interrogator includes a transmit antenna; a first receive antenna, and circuitry configured to generate, using radio-frequency (RF) signal synthesis information received from the synchronization circuitry, a first RF signal for transmission by the transmit antenna, and generate, using the first RF signal and a second RF signal received from a target device by the first receive antenna, a first mixed RF signal indicative of a distance between the first interrogator and the target device. The second interrogator includes a second receive antenna, and circuitry configured to generate, using the RF signal synthesis information, a third RF signal; and generate, using the third RF signal and a fourth RF signal received from the target device by the second receive antenna, a second mixed RF signal indicative of a distance between the second interrogator and the target device.

A dielectric resonator antenna (DRA) includes: an electrically conductive ground structure; at least one volume of a dielectric material disposed on the ground structure; a signal feed disposed and structured to be electromagnetically coupled to the at least one volume of a dielectric material; and an electrically conductive fence disposed circumferentially around the at least one volume of a dielectric material, and electrically connected with and forming part of the electrically conductive ground structure.

A dielectric resonator antenna (DRA) includes: an electrically conductive ground structure; a plurality of volumes of dielectric materials disposed on the ground structure comprising N volumes, N being an integer equal to or greater than 3, disposed to form successive and sequential layered volumes V(i), i being an integer from 1 to N, wherein volume V(1) forms an innermost volume, wherein a successive volume V(i+1) forms a layered shell disposed over and at least partially embedding volume V(i), wherein volume V(N) at least partially embeds all volumes V(1) to V(N1); and a signal feed disposed and structured to be electromagnetically coupled to one or more of the plurality of volumes of dielectric materials.

A dielectric resonator antenna having a dielectric substrate with a ground plane and a dielectric resonator element arranged on the ground plane includes a conductive feeding assembly operable to excite one or more dielectric resonator modes of the dielectric resonator element for generation of a first circularly polarized electromagnetic field, and a radiating arrangement operable to produce a second circularly polarized electromagnetic field complementary to the first circularly polarized electromagnetic field. The first and second circularly polarized electromagnetic fields, when combined, are arranged to provide a unilateral circularly polarized electromagnetic field.

Dielectric resonator antennas suitable for use in compact radiofrequency (RF) antennas and devices, and methods of fabrication thereof. Described are dielectric resonator antennas fabricated using polymer-based materials, such as those commonly used in lithographic fabrication of integrated circuits and microsystems. Accordingly, lithographic fabrication techniques can be employed in fabrication. The polymer-based dielectric resonator antennas can be excited using tall metal vertical structures, which are also fabricated using techniques adapted from integrated circuit and microsystems fabrication.

A dielectric resonator antenna includes a dielectric resonator element, a ground plane, and a conductive feeding arrangement. The ground plane is connected with the dielectric resonator element, and is operable to generate a first electromagnetic radiation. The conductive feeding arrangement is operable to generate a second electromagnetic radiation. During operation, simultaneous generation of the first electromagnetic radiation and the second electromagnetic radiation provides a unilateral electromagnetic radiation.

A planar multi-layer assembly method fabricates a dual frequency, dual polarization phased-array antenna. A plurality of vias make up an array of double-walled wells which are connected to a ground plane. A shorted annular ring patch antenna (SARPA) is deposited at the top of each double-walled well. Fabricated coaxially and parallel to each SARPA, is an array of circular patch antennas (CPA). The inner wall of each double-walled well improves isolation of the CPA signals from the SARPA signals. Each SARPA of the array is connected to a pair of first frequency band signal vias and the CPA is coupled to a pair of second frequency band signal vias. Within each frequency band, a plurality of signal phases enable steerable polarized antenna beams.

A system comprising synchronization circuitry, a first interrogator, and a second interrogator. The first interrogator includes a transmit antenna; a first receive antenna, and circuitry configured to generate, using radio-frequency (RF) signal synthesis information received from the synchronization circuitry, a first RF signal for transmission by the transmit antenna, and generate, using the first RF signal and a second RF signal received from a target device by the first receive antenna, a first mixed RF signal indicative of a distance between the first interrogator and the target device. The second interrogator includes a second receive antenna, and circuitry configured to generate, using the RF signal synthesis information, a third RF signal; and generate, using the third RF signal and a fourth RF signal received from the target device by the second receive antenna, a second mixed RF signal indicative of a distance between the second interrogator and the target device.