摘要:
An antenna apparatus includes antenna elements, each made of a conductive plate. The antenna elements are provided along a reference axis passing through first and second positions of the antenna apparatus, and close to a section between the first and second positions. Each of the antenna elements has first and second portions along a circumference of the antenna element, the first portion is close to the reference axis and electromagnetically coupled to the other antenna element, and the second portion is remote from the reference axis. The first portions of the respective antenna elements are shaped so that the antenna elements are the closest to each other near the first position, and a distance between the antenna elements gradually increases from the first position to the second position. The antenna apparatus has feed points provided on the antenna elements, respectively, and near the first position.
摘要:
A radiator is provided with a looped radiation conductor, a capacitor, an inductor, a feed point on the radiation conductor, and a magnetic block provided at at least a part of the inside of a loop of the radiation conductor. When the radiator is excited at a low-band resonance frequency, a first current flows through a first path extending along an inner perimeter of the loop of the radiation conductor and including the inductor and the capacitor. Magnetic flux produced by the first current passes through the magnetic block, thus increasing the inductance of the radiation conductor. When the radiator is excited at a high-band resonance frequency, a second current flows through a second path including a section extending along an outer perimeter of the loop of the radiation conductor, the section including the capacitor but not including the inductor, the section extending between the feed point and the inductor.
摘要:
A radiator is provided with a looped radiation conductor, a capacitor, an inductor, a feed point on the radiation conductor, and a dielectric block provided in a portion where the radiation conductor and the ground conductor are close to each other. At a low-band resonance frequency, a current flows through a path extending along an inner perimeter of the loop of the radiation conductor and including the inductor and the capacitor. At a high-band resonance frequency, a current flows through a path including a section extending along an outer perimeter of the loop of the radiation conductor, including the capacitor but not including the inductor, and extending between the feed point and the inductor, and a parallel resonant circuit is formed from: a capacitance between the radiation conductor and the ground conductor between which the dielectric block is provided; and an inductance of the radiation conductor.
摘要:
A power transfer system is provided with a transmission coil and a reception coil respectively provided along a first surface and a second surface that face each other proximal to each other. The transmission coil and reception coil are provided proximally to be electromagnetically coupled to each other. The winding wire of the transmission coil is wound on the first surface, and the winding wire of the reception coil is wound on the second surface. The power transfer system is provided with a magnetic body provided proximately so as to be electromagnetically coupled to the transmission coil and the reception coil to cover at least one part of a region in which at least the winding wires of the transmission coil and reception coil are present between the first surface and the second surface.
摘要:
An information transmission system is provided with a transmission coil and a reception coil respectively provided along a first surface and a second surface that face each other proximal to each other. The transmission coil and reception coil are provided proximally to be electromagnetically coupled to each other. The winding wire of the transmission coil is wound on the first surface, and the winding wire of the reception coil is wound on the second surface. The information transmission system is provided with a magnetic body provided proximately so as to be electromagnetically coupled to the transmission coil and the reception coil to cover at least one part of a region in which at least the winding wires of the transmission coil and reception coil are present between the first surface and the second surface.
摘要:
In a radiator, a large loop is formed by radiation conductors, first and second capacitors, and first and second inductors, and a small loop is formed by portions of the radiation conductors close to each other, the second capacitor, and the second inductor. The radiator is configured such that its first portion, second portion, and third portion resonate at predetermined frequencies, respectively. The first portion extends along the large loop, and includes the first inductor, the first capacitor, and one of the second inductor and the second capacitor. The second portion includes a section extending from a feed point to a second position through one of the first inductor and the first capacitor, and includes the small loop. The third portion includes a section extending from the feed point to the second position through the first capacitor.
摘要:
A radiator is provided with a looped radiation conductor, a capacitor, an inductor, a feed point on the radiation conductor, and a dielectric block provided in a portion where the radiation conductor and the ground conductor are close to each other. At a low-band resonance frequency, a current flows through a path extending along an inner perimeter of the loop of the radiation conductor and including the inductor and the capacitor. At a high-band resonance frequency, a current flows through a path including a section extending along an outer perimeter of the loop of the radiation conductor, including the capacitor but not including the inductor, and extending between the feed point and the inductor, and a parallel resonant circuit is formed from: a capacitance between the radiation conductor and the ground conductor between which the dielectric block is provided; and an inductance of the radiation conductor.
摘要:
In a radiator, a large loop is formed by radiation conductors, first and second capacitors, and first and second inductors, and a small loop is formed by portions of the radiation conductors close to each other, the second capacitor, and the second inductor. The radiator is configured such that its first portion, second portion, and third portion resonate at predetermined frequencies, respectively. The first portion extends along the large loop, and includes the first inductor, the first capacitor, and one of the second inductor and the second capacitor. The second portion includes a section extending from a feed point to a second position through one of the first inductor and the first capacitor, and includes the small loop. The third portion includes a section extending from the feed point to the second position through the first capacitor.
摘要:
This antenna apparatus is provided with two antenna elements, two feeding lines, a feeding point provided at one end of the antenna element, and a feeding point provided at the one end of the antenna element. The feeding lines extend in a first direction from the feeding points. The antenna element extends from the feeding point in a second direction perpendicular to the first direction, and the antenna element extends from the feeding point in a third direction which is oriented opposite to the second direction. The antenna apparatus is provided with a sleeve element which has an end which is connected to a respective grounded conductor of each of the feeding lines at positions near the feeding points, and extends in the first direction from the position near the feeding points.
摘要:
A radiator includes a looped radiation conductor, a capacitor, an inductor, and a feed point on a radiation conductor. In a portion where the radiation conductor and a ground conductor are close to each other, a distance between the radiation conductor and the ground conductor gradually increases as a distance from the feed point along the looped radiation conductor increases. When the radiator is excited at a low-band resonance frequency, a current flows along a first path extending along an inner perimeter of the looped radiation conductor and including the inductor and the capacitor. When the radiator is excited at a high-band resonance frequency, a second current flows through a second path including a section extending along an outer perimeter of the looped radiation conductor, and the section including the capacitor but not including the inductor, and the section extending between the feed point and the inductor.