Abstract:
An antenna having a plurality of elongated conductors is disclosed. The elongated conductors have a substantially straight portion and a substantially helical portion.
Abstract:
The invention is to provide such an antenna module making broadband of transmitting and receiving frequencies, while realizing miniaturization. The invention has a structure comprising a mounting body; a chip antenna having a substrate mounted on the mounting body and a substrate and a couple of terminal parts provided on the substrate; an feeding portion to which one of the terminal parts provided on the mounting body is connected; a open portion to which the other of the terminal parts provided on the mounting body is connected; and a capacitive conductor provided in opposition to the substrate, thereby to make use of a bottom area hidden when mounting the chip antenna so as to increase capacitive components for realizing broadband of the antenna module.
Abstract:
In order to improve the reception capability of a portable terminal device while waiting for calls from a satellite, a small reflecting plate (9) in the form of a saucer is disposed below a rod-shaped satellite communication antenna (7) which is folded to hold downwardly when the portable terminal device is in the state of on-hook, waiting for calls.
Abstract:
The invention concerns a passive tunable broadband antenna. The antenna radiating element consists of stacked toroids (T) connected in series, means (a, c) being provided for shorting the toroids individually and at will, and means (b, d) being provided for interrupting the connection between any two successive toroids. The invention is particularly applicable to the 30-412 MHz operating range.
Abstract:
An antenna 10a equipped on a mobile communication device 1 includes a helical antenna 12 protruding from a casing 2 (key side casing portion 4) of the mobile communication device 1 and a cap 13 covering a surface of the helical antenna 12 and is constructed such that degradation of antenna gain of the helical antenna 12 due to contact of a finger 100 with the helical antenna is prevented by increasing a distance between an outer peripheral surface of the cap 13 and a surface of the helical antenna 12 to at least 1.00 mm by increasing a wall thickness of the cap 13.
Abstract:
An antenna having an antenna cup and a helical element mounted in the antenna cup. The antenna cup has a side wall extending from a base thereof towards an open end thereof, the side wall having a plurality of slots formed therein, a first set of the slots being arranged parallel to a longitudinal axis of the helical element and a second set of the slots being arranged perpendicular to the longitudinal axis of the helical element, the first set of slots being arranged to surround an upper portion of the helical element and the second set of slots being arranged to surround a lower portion of the helical element. The slots present a high impedance wall to surface currents and thereby significantly reduce side lobe radiation. Such an antenna is particular useful in antenna co-location applications, such as cellular telephone and Wi-Fi applications.
Abstract:
Disclosed herein is an antenna unit with integrated TV and communication antennas for portable communication terminals. The antenna unit comprises a TV antenna and a communication antenna. The TV antenna comprises a rod antenna for receiving a TV signal, and a guide antenna for receiving the TV signal from the rod antenna and transmitting the received TV signal to a TV tuner. The communication antenna comprises a helical antenna for receiving a communication signal, and a connector for receiving the communication signal from the helical antenna and transmitting the received communication signal to a radio frequency (RF) unit.
Abstract:
In a transmission antenna provided with an antenna coil ouffitted with a core whereon a coil is mounted by winding, and with a capacitor connected to the aforementioned coil forming a serial resonance circuit between the aforementioned antenna coil inductance, the aforementioned antenna coil is outfitted with small core screw with a core smaller than the aforementioned core, and with a joining material that magnetically joins the aforementioned screw to the aforementioned core and with a screw hole that serves as a non-magnetic distance adjuster whereby the distance between the aforementioned core and the aforementioned screw is adjustable, and the resonance frequency is set by adjusting the thread volume of the aforementioned screw.
Abstract:
An antenna device includes a substrate, and a radiating element disposed on the substrate. The radiating element has two spiral arms unfurling in an Archimedean progression and terminating in a logarithmic progression. The substrate is formed from a dielectric material and includes multiple perforations for providing passage of coolant through the substrate. The radiating element is disposed on a front surface of the substrate, and an enclosure is formed on a rear surface of the substrate to provide a reflective cavity for reflecting radiation to the front surface of the substrate. The enclosure includes a hexagonal perimeter formed by a wall. The antenna device may be used as an element in a planar phased array.
Abstract:
A linear antenna, such as a monopole antenna, is placed in the axis of a circular polarized antenna, such as a printed patch antenna or a helical antenna. The linear antenna can be optimized for a terrestrial communication system while the circular polarized antenna can be optimized for a satellite system.