A wireless handheld or portable device includes an antenna system operable in a first frequency region and a higher, second frequency region. The antenna system comprises an antenna structure, a matching and tuning system, and an external input/output (I/O) port. The antenna structure comprises at least one radiating element including a connection point, a ground plane layer including at least one connection point, and at least one internal I/O port. At least one radiating element of the antenna structure protrudes beyond the ground plane layer. The antenna structure features at any of its internal I/O ports when disconnected from the matching and tuning system an input return loss curve having a minimum at a frequency outside the first frequency region of the antenna system. The matching and tuning system modifies the impedance of the antenna structure and provides impedance matching to the antenna system in the first and second regions.

A wireless handheld or portable device includes an antenna system operable in a first frequency region and a higher, second frequency region. The antenna system comprises an antenna structure, a matching and tuning system, and an external input/output (I/O) port. The antenna structure comprises at least one radiating element including a connection point, a ground plane layer including at least one connection point, and at least one internal I/O port. At least one radiating element of the antenna structure protrudes beyond the ground plane layer. The antenna structure features at any of its internal I/O ports when disconnected from the matching and tuning system an input return loss curve having a minimum at a frequency outside the first frequency region of the antenna system. The matching and tuning system modifies the impedance of the antenna structure and provides impedance matching to the antenna system in the first and second regions.

Embodiments of the present invention provide a multi-band active antenna, including a broadband antenna, a combiner, and an active module, where a concave window is disposed on an enclosure frame of the broadband antenna, and a first port of the broadband antenna is disposed in the window; the combiner is removably connected to the window, and a first port of the combiner is connected to the first port of the broadband antenna; and a mounting kit is disposed on the enclosure frame of the broadband antenna, and the active module is removably connected to the mounting kit and a first port of the active module is connected to a second port of the combiner by a conducting wire.

Embodiments of the present invention provide a multi-band active antenna, including a broadband antenna, a combiner, and an active module, where a concave window is disposed on an enclosure frame of the broadband antenna, and a first port of the broadband antenna is disposed in the window; the combiner is removably connected to the window, and a first port of the combiner is connected to the first port of the broadband antenna; and a mounting kit is disposed on the enclosure frame of the broadband antenna, and the active module is removably connected to the mounting kit and a first port of the active module is connected to a second port of the combiner by a conducting wire.

An antenna apparatus is provided with a dielectric substrate, a feed point, a first radiation conductor, a second radiation conductor, and a through-hole conductor. The first radiation element is capacitively coupled to the second radiation element in a portion where the first and second radiation conductors overlaps with each other via the dielectric substrate. At least one of the first and second radiation elements has a meander portion formed in the portion where the first and second radiation elements are capacitively coupled to each other, and an LC resonator is formed of the meander portion, and the portion where the first and second radiation elements are capacitively coupled to each other.

An antenna device (10) includes a feed element (11) including a first portion (111) and a second portion (112) and a non-feed element (12) including a plurality of folded back portions (121 to 125). The width (W2) of the second portion of the feed element is rendered larger than the width (W3) of the non-feed element, and at least the second portion of the feed element is configured to be coupled to the plurality of folded back portions of the non-feed element.

An antenna structure includes a feed end, a ground end, a first radiator, a second radiator, and a third radiator. Both of the first radiator and the second radiator are connected to the feed end. The second radiator includes a first connection section and a second connection section. The third radiator is connected to the ground end, and includes a first coupling section separated from the first connection section and a second coupling section separated from the second connection section. A first gap is defined between the first coupling section and the first connection section; and a second gap is defined between the second coupling section and the second connection section.

An antenna structure includes a feed unit, a grounding unit, a first radiating unit, a second radiating unit, third radiating unit, fourth radiating unit, and a fifth radiating unit. The grounding unit is spaced apart from the feed unit. The first radiating unit is electrically connected to the feed unit. The second radiating unit is electrically connected to the grounding unit. The third radiating unit is electrically connected to the first radiating unit, the second radiating unit, and the fourth radiating unit. The fifth radiating unit is electrically connected to the feed unit and couples with the fourth radiating unit.

The presence or absence of objects (e.g., medical implements, medical supplies) tagged with transponders may be determined in an environment in which medical procedures (e.g., surgery) are performed via an interrogation and detection system which includes a controller and a plurality of antennas positioned along a patient support structure. The antennas may, for example, be positioned along an operating table, bed, a mattress or pad or a sheet and may be radiolucent. Respective antennas may successively be activated to transmit interrogation signals. Multiple antennas may be monitored for responses from transponders to the interrogation signals. For example, all antennas other than the antenna that transmitted the most recent interrogation signal may be monitored.

The presence or absence of objects (e.g., medical implements, medical supplies) tagged with transponders may be determined in an environment in which medical procedures (e.g., surgery) are performed via an interrogation and detection system which includes a controller and a plurality of antennas positioned along a patient support structure. The antennas may, for example, be positioned along an operating table, bed, a mattress or pad or a sheet and may be radiolucent. Respective antennas may successively be activated to transmit interrogation signals. Multiple antennas may be monitored for responses from transponders to the interrogation signals. For example, all antennas other than the antenna that transmitted the most recent interrogation signal may be monitored.