Provided according to an embodiment is a vehicle-mounted antenna system. The antenna system may comprise: a circuit board; an antenna configured to have an aperture region corresponding to the inside of a metal pattern above the circuit board and be fixed to the circuit board through a short portion; and a coupling feed portion configured to be connected to the circuit board and radiate a signal to the aperture region.

An antenna assembly may include an antenna region having conductive patterns on one side surface of a dielectric substrate to radiate radio signals. The antenna region may include a first antenna structure and a second antenna structure. The antenna assembly may further include a ground region formed on a same plane as the antenna region. The ground region may include a first slot region and a second slot region. A first feeding line may be disposed at the first slot region, and a second feeding may be disposed at the second slot region. The antenna region may comprise a first conductive pattern, a second conductive pattern, a third conductive pattern, a fourth conductive pattern and a fifth conductive pattern.

An active biconical antenna and a receive array comprising a combination of active biconical and Vivaldi antennas. In one configuration, the active biconical antenna includes upper and lower cones. Each cone has a respective truncated apex. First and second feed points are respectively connected to the truncated apexes of the upper and lower cones and to first and second conductors. The active biconical antenna further includes a buffer amplifier having respective input terminals connected to the first and second conductors. The buffer amplifier has an input impedance that is impedance matched to an antenna impedance at and above but not below a frequency f.sub.c and is higher than the antenna impedance at frequencies substantially less than f.sub.c. The buffer amplifier also has an output impedance that is impedance matched to a system impedance at frequencies both above and below f.sub.c. A length of the first and second conductors is less than a wavelength at the frequency f.sub.c.

As a non-limiting example, various aspects of this disclosure provide embodiments of antenna apparatus using monocone antennas for wireless communication.

As a non-limiting example, various aspects of this disclosure provide embodiments of antenna apparatus using monocone antennas for wireless communication.

An antenna element includes a first conductor at a first lateral surface of a substrate having a feed line portion and a monopole portion with a neck extending from the feed line portion and a head at a distal end of the neck. The head has a width greater than a width of the neck and greater than a width of the feed line portion. The head has a slot to increase a bandwidth of the first conductor to at least a first frequency band and a second frequency band. A second conductor is provided on the first lateral surface having first and second ground planes and first and second stubs. The ground planes are disposed adjacent to the feed line portion at opposite sides thereof. The stubs are disposed at opposite sides of the ground planes and extend in a direction essentially parallel to the feed line portion. The ground planes and the stubs are arranged relative to the first conductor to form a coplanar waveguide.

An ultra-wideband mobile mount antenna with a capacitive ground structure-based matching structure. The antenna has a return loss better than 10 dB over an operating frequency range of 250 MHz to 1220 MHz.

An electrically small antenna operable in both single-ended and differential antenna systems, and corresponding circuitry configurations, is provided. The antenna may be arranged on or in a wearable audio device, such as an earbud. The antenna may include a first curved arm electrically coupled to a first port. The antenna may include a second curved arm of equal size and equal shape as the first curved arm and electrically coupled to a second port. The second curved arm may be rotationally positioned 180 degrees, relative to the first curved arm, about an imaginary axis perpendicular to a surface of the wearable audio device. The single-ended antenna system may include a radio frequency integrated circuit (“RFIC”), fixed matching network, a tuneable capacitor, and a switching circuit. The differential antenna system may include an RFIC, fixed matching network, a tuneable capacitor, and a balun.

An active biconical antenna and a receive array comprising a combination of active biconical and Vivaldi antennas. In one configuration, the active biconical antenna includes upper and lower cones. Each cone has a respective truncated apex. First and second feed points are respectively connected to the truncated apexes of the upper and lower cones and to first and second conductors. The active biconical antenna further includes a buffer amplifier having respective input terminals connected to the first and second conductors. The buffer amplifier has an input impedance that is impedance matched to an antenna impedance at and above but not below a frequency f.sub.c and is higher than the antenna impedance at frequencies substantially less than f.sub.c. The buffer amplifier also has an output impedance that is impedance matched to a system impedance at frequencies both above and below f.sub.c. A length of the first and second conductors is less than a wavelength at the frequency f.sub.c.

An antenna device (10) for vehicle, includes a first antenna element (100) disposed on a ground (20), and a second antenna element (200) disposed on the ground (20), and at least a portion of the first antenna element (100) and at least a portion of the second antenna element (200) are capacitively coupled.