An antenna device includes: a feeding antenna conductor; a non-feeding antenna conductor; a ground conductor; a first artificial magnetic conductor disposed between the feeding antenna conductor and the non-feeding antenna conductor, and the ground conductor; and a second artificial magnetic conductor disposed side by side with the first artificial magnetic conductor and electrically connected to the ground conductor. The feeding antenna conductor and the non-feeding antenna conductor are disposed on the first artificial magnetic conductor.

A wavelength selective structure for selectively reflecting or absorbing incident electromagnetic visible or infrared radiation. The wavelength selective structure includes a wavelength selective structure with a plurality of layers, including a compound layer forming a plurality of surface elements, an electrically isolating intermediate layer, wherein the compound layer is in contact with a first surface of the electrically isolating intermediate layer, and a continuous electrically conductive layer in contact with a second surface of the electrically isolating intermediate layer. The compound layer includes at least one metallic layer and at least one dielectric layer. The selective surface has at least one resonance band for selectively reflecting or absorbing visible or infrared radiation based on a resonant electromagnetic coupling between the plurality of surface elements and the continuous electrically conductive layer.

An antenna assembly for use in a tile architecture antenna system. The antenna assembly comprises: i) a first substrate layer having a first surface and a second surface; ii) a plurality of electromagnetic band gap (EBG) patches disposed on a first surface of the first substrate layer; iii) a second substrate layer having a first surface and a second surface, wherein the second surface of the second substrate layer is disposed on the first surface of the first substrate layer and on the plurality of EBG patches; iv) an antenna disposed on the first surface of the second substrate layer; and v) a transceiver circuit disposed proximate the second surface of the first substrate layer, wherein the transceiver circuit provides an output signal to be transmitted by the antenna.

An apparatus includes a substrate containing a cavity and a dielectric structure covering at least a portion of the cavity. The cavity is hermetically sealed. The apparatus also may include a launch structure formed on the dielectric structure and outside the hermetically sealed cavity. The launch structure is configured to cause radio frequency (RF) energy flowing in a first direction to enter the hermetically sealed cavity through the dielectric structure in a direction orthogonal to the first direction.

An electromagnetic band gap element is provided. In the electromagnetic band gap element, a first planar conductor and a second planar conductor are respectively formed on a first plane and a second plane which are parallel to each other, and a first linear conductor is formed on at least one third plane that is parallel to the first plane and the second plane and is located between the first plane and the second plane. The first planar conductor and the second planar conductor are connected via the first linear conductor.

Presently disclosed is an antenna system having an array of ridged waveguide Vivaldi radiator (RWVR) antenna elements fed through a corporate network of suspended air striplines (SAS) with an electromagnetic bandgap (EBG) ground plane surrounding the ridged waveguide transition. The SAS transfers the electromagnetic energy to the radiating element via the ridged waveguide coupler. The Vivaldi radiator matches the output impedance of the ridged waveguide coupler/SAS to the intrinsic impedance of the surrounding medium. The EBG, which may be comprised of a photonic bandgap material or other metamaterial, allows for better frequency and bandwidth performance in a lower-profile array package, thereby reducing size and weight of the array for applications requiring small size and or low-inertia packaging. In alternate embodiments, radiating elements other than Vivaldi radiators may be used. This configuration also reduces the complexity of the manufacturing process, which in turn lowers cost.

A surface current suppression filter (1) is a bandstop filter that suppresses propagation of a surface current in a predetermined propagation direction on a dielectric substrate (2). The filter (1) is configured such that a plurality of electromagnetic band gap (EBG) rows (10, 20) are arrayed in an array direction. Each EBG row (10, 20) has at least one EBG (11, 21) that is arrayed in a perpendicular direction orthogonal to the array direction. Cutoff characteristics of a first EBG (11) in the first EBG row (10) differs from cutoff characteristics of a second EBG (12) in the second EBG row (20).

An antenna device includes: a first conductor layer; a second conductor layer located opposite to the first conductor layer; and a third conductor layer located opposite to the second conductor layer. The first conductor layer includes: a feed element; a first grounding element located next to the feed element in a first direction and grounded; and a parasitic element located along the feed element and the first grounding element and insulated from the feed element and the first grounding element. The second conductor layer includes: a floating element located opposite to the feed element and insulated from the first conductor layer; and a second grounding element located opposite to the first grounding element and next to the floating element and grounded. The third conductor layer includes a third grounding element grounded.

An antenna system for a global navigation satellite system reference base station is disclosed.

The antenna system includes an antenna positioned above a high capacitive impedance surface (HCIS) ground plane.

Over a specific range of the lateral dimension of the HCIS ground plane and the height of the antenna above the HCIS ground plane, a high level of multipath suppression and high sensitivity for low-elevated satellites can be simultaneously maintained.

The HCIS ground plane can be fabricated as a flat conducting plate with an array of conducting elements such as pins, pins with expanded tips, or mushroom structures. Alternatively, the HCIS can be fabricated as a flat conducting plate with a concentric series of choke rings.

The antenna system can provide a positioning accuracy of +/−1 mm, an order of magnitude improvement over previous designs.

According to various embodiments, an electronic device may comprise: a housing including a first plate, a second plate oriented in a direction opposite to the first plate, and a side member surrounding a space between the first plate and the second plate; and, as an antenna structure including at least one plane parallel to the second plate, wherein the antenna structure includes a first element disposed on the plane, a second element spaced apart from the first element on the plane when viewed from above the plane, and a third element spaced apart from the second element on the plane when viewed from above the plane, the second element being disposed between the first element and the third element, a wireless communication circuit electrically configured to transmit and receive a signal having a frequency range of 10 GHz-100 GHz, wherein the wireless communication circuit includes a first electrical path connected to the first element, a second electrical path connected to a first point on the second element, the first point being closer to the first element than to the third element, a third electrical path connected to a second point on the second element, the second point being closer to the third element than to the first element, and a fourth electrical path connected to the third element, and the wireless communication circuit is configured to provide a phase difference between a first signal from the first point and a second signal from the second point. Various other embodiments may also be possible.