Abstract: The present disclosure relates to a cover plate, a display panel and a display terminal. The cover plate includes a first region and a second region surrounding the first region. The second region includes a plurality of side cover plate regions and at least one corner opening region located between two adjacent side cover plate regions. The cover plate includes at least one buffer portion which is filled in the corner opening region.

Abstract: The present application relates to a terminal, including: a main board, a middle frame, a radio frequency circuit layer, a screen, and a plurality of antennas, where the middle frame is located between the main board and the radio frequency circuit layer, the radio frequency circuit layer is located between the screen and the middle frame, and the plurality of antennas are connected to the main board by using radio frequency lines in the radio frequency circuit layer.

Abstract: Disclosed herein includes a wireless electronic device, including an outer casing, an antenna, and a metallic sheet. The outer casing may be electrically non-conductive. The antenna may be disposed within the outer casing and configured to perform wireless communication of signals at an operating wavelength of ? unit length. The metallic sheet may be disposed on a portion of the outer casing and placed at a distance of at least ?/25 unit length apart from the antenna. The metallic sheet may be configured to shield a subject exposed to energy radiated by the antenna to limit the specific absorption rate (SAR) of the subject to less than 1.6 W/kg.

Abstract: A mobile device supporting wideband operations includes a first radiation element, a second radiation element, a third radiation element, and a dielectric substrate. The first radiation element has a feeding point. The second radiation element is coupled to the ground voltage. The first radiation element is at least partially surrounded by the second radiation element. The feeding point is coupled through the third radiation element to the ground voltage. The first radiation element, the second radiation element, and the third radiation element are disposed on the dielectric substrate. An antenna structure is formed by the first radiation element, the second radiation element, and the third radiation element.

Abstract: Provided is an electronic device that includes a first housing including a first side facing a first direction, a second side facing a second direction opposite to the first direction, and a first lateral side surrounding at least part of a space between the first side and the second side, wherein the first lateral side includes a first conductive portion and a first non-conductive portion; a second housing including a third side facing a third direction, a fourth side facing a fourth direction opposite to the third direction, a second lateral side surrounding at least part of a space between the third side and the fourth side and a ground member, wherein the second lateral side includes a second conductive portion and a second non-conductive portion; a flexible display disposed in the first housing and the second housing; a connecting member which connects the first housing and the second housing such that the first housing and the second housing are folded to face each other, wherein when the first housing

Abstract: A beam steering antenna structure comprising a printed circuit board and a conductive component, a first wall and a second wall of the printed circuit board being juxtaposed with a first surface of the conductive component, the second wall abutting and being galvanically connected to the first surface. A second surface of the conductive component extends at an angle from the first surface. A connecting surface extends between the first wall and the second wall such that a groove is formed, the groove being partially juxtaposed to the first surface. The groove comprises a first antenna array and a second antenna array transmitting or receiving, respectively, a first radiation beam and a second radiation beam having orthogonal polarizations. The second surface steers at least one of the first or second radiation beam in a direction away from or towards the connecting surface.

Abstract: A bicycle electric component comprises a wireless communicator, a casing, and an electromagnetic shield. The wireless communicator is configured to receive a wireless signal. The casing has an internal space. The wireless communicator is disposed in the internal space of the casing. The electromagnetic shield includes a shield member to cover at least a part of the wireless communicator. The shield member of the electromagnetic shield is a separate member with respect to the casing.

Abstract: Systems and methods are provided for transferring a remote frequency identification (RFID) inlay from a first substrate to a second substrate. An RFID inlay is secured to a first substrate with a first adhesive. The RFID inlay is brought into the vicinity of a second substrate and secured to the second substrate with a second adhesive. The RFID inlay is then dissociated from the first substrate. The RFID inlay may be dissociated from the first substrate by softening the first adhesive, such as by the application of heat or the application of a softening substance. Alternatively, the RFID inlay may be dissociated from the first substrate without softening the first adhesive, but rather by differential release, whereby a release force is applied between the two substrates, with the release force being greater than the release strength of the first adhesive, but less than the release strength of the second adhesive.

Abstract: A multi-antenna system and an electronic device comprising the same. An intelligent multi-antenna solution in which antennas are laid out at the top, the side, and the bottom of an electronic device is used, so that three antenna groups including a top antenna group, a middle antenna group, and a bottom antenna group are respectively formed, and antenna performance in a plurality of scenarios such as a free-space scenario, a portrait-mode holding scenario, and a landscape-mode holding scenario is considered, to improve antenna radiation efficiency.

Abstract: An antenna module according to an embodiment of the present disclosure includes a main board, a ground area formed in a rectangular shape on at least a portion of a main board, a pair of power feeding units formed at edge portions of the ground area while being spaced apart from each other, and a pair of monopole antennas electrically connected to the power feeding units, respectively, and disposed on the ground area while protruding from the ground area. The monopole antennas may be configured to be asymmetric about the feeding unit.

Abstract: In an antenna configuration in which two omnidirectional antenna elements that are arranged on a printed board, a device GND plane connected to a ground potential is formed on the printed board so as to cover an area other than a part where an electronic circuit is formed on the printed board, and parasitic antenna elements that are a first parasitic antenna element and a second parasitic antenna element are arranged at positions adjacent to the respective two omnidirectional antenna elements, in a state of being parallel to the omnidirectional antenna elements, and the parasitic antenna elements are arranged in a state of being close to the device GND plane, and entire lengths of the parasitic antenna elements are each set to be a length that is (½) of a wavelength of radio waves handled by the omnidirectional antenna element.

Abstract: An electronic device may include an antenna disposed on a substrate. The antenna may include a ring of conductive traces, a fed arm, and an unfed arm. The fed arm and the unfed arm may extend from opposing segments of the ring. The ring may be coupled to ground by fences of conductive vias extending through the substrate. The first arm may have a first radiating edge. The second arm may have a second radiating edge. The first radiating edge may be separated from the second radiating edge by a gap. The first arm may indirectly feed the second arm via near-field electromagnetic coupling across the gap. The first and second arms may collectively radiate in an ultra-wideband (UWB) frequency band.

Abstract: An electronic device may comprise: a first cover; a second cover coupled to the first cover and configured to perform a sliding operation; a rollable display including a first display area visible in a rolled state and a second display area unrolled in response to the sliding operation of the second cover; a first antenna including a plurality of first antenna elements disposed in the first display area of the rollable display; a second antenna including a plurality of second antenna elements disposed in the second display area of the rollable display; and a processor. The processor may be configured to: form a plurality of directional beams using the first antenna based on a first beam table in a rolled state of the rollable display, and to form a plurality of directional beams using at least a part of the second antenna elements and the first antenna based on a second beam table based on the size of a visible area of the rollable display increasing from the rolled state.

Abstract: An antenna device and a wireless communication apparatus capable of implementing increase in bandwidth and reduction of the manufacturing cost are provided. The antenna device includes a first antenna element and a second antenna element arranged on one face side of the first antenna element. The first antenna element includes a first glass substrate and a first patch antenna provided on the first glass substrate. The second antenna element includes a second glass substrate and a second patch antenna provided on the second glass substrate. At least part of the first patch antenna faces the second patch antenna with an air gap interposed therebetween.

Abstract: Provided is an antenna module including a first planar inverted-F antenna radiator, a first ground plane, a second ground plane, and a conductor. The first planar inverted-F antenna radiator includes a first feeding terminal and a first ground terminal. The first ground terminal is connected to the first ground plane. The second ground plane is located on one side of the first ground plane. A gap exists between the first ground plane and the second ground plane. The conductor is located between the first ground plane and the second ground plane and connects the first ground plane with the second ground plane.

Abstract: An electronic device includes a first part and a second part that can be folded or expanded relative to each other. The electronic device has a closed state and an open state When the electronic device is in the closed state, a frame of the first part and a frame of the second part partially or totally overlap. The first part includes a first feeding antenna. The second part includes a first parasitic antenna, and when the electronic device is in the closed state, the first parasitic antenna is not grounded and can be coupled to the first feeding antenna.

Abstract: A convertible information handling system comprising an antenna feed operatively coupled to a wireless adapter and an hinged adjustable antenna spanning a hinge for communicating on a wireless link, the hinge pivoting between a first antenna portion of the hinged adjustable antenna on a display chassis and a second antenna portion of an hinged adjustable antenna on a base chassis and the hinge which rotates the convertible information handling system between a first configuration and a tablet configuration and a first adjustable antenna configuration in the first configuration and a second adjustable antenna configuration in the tablet configuration, where the first adjustable antenna configuration supports a first bandwidth at the wireless adapter and the second adjustable antenna configuration supports a second bandwidth at the wireless adapter.

Abstract: A portable information handling system glass ceramic housing integrates plural wires on opposing sides that interface with a radio to provide a dipole antenna, such as with a radio conductor output interfaced at a wire of the interior side and a radio ground output interfaced at a wire of the exterior side. Conductive contacts interface with the wires by exposure at the glass ceramic housing interior where pogo pins of a printed circuit board assembly bias against the conductive contacts to communicate the radio signals. In one example embodiment, the conductive contacts co-locate with a logo etched into the glass ceramic housing to provide an aesthetically pleasing antenna interface that is difficult to visually detect at the glass ceramic housing exterior.

Abstract: An antenna device (10) includes a substrate (100) including a first surface (102), a first antenna (200) provided on the substrate (100), a second antenna (300) provided on the substrate (100), and a third antenna (400) provided on the first surface (102) of the substrate (100), and a center point (CP) of the third antenna (400) is positioned on the same side as an end portion (EP2) of the second antenna (300) furthest from the first antenna (200), relative to a center line (CL) passing through a center of a line (L) connecting an end portion (EP1) of the first antenna (200) furthest from the second antenna (300) and the end portion (EP2) of the second antenna (300) furthest from the first antenna (200), or relative to a center line (CL) of the first surface (102) of the substrate (100).

Abstract: An ultra-wide band dipole antenna assembly for transmitting or receiving electromagnetic signals is disclosed herein. The antenna assembly comprises a dipole antenna element and coplanar waveguide feeding network. The dipole antenna delivers the ultra-wide band matching through a pre-determined arrangement after the coplanar waveguide feeding network is applied.

Abstract: Reconfigurable antenna systems with ground tuning pads are provided herein. In certain configurations, an antenna system includes an antenna element, a first tuning conductor spaced apart from the antenna element on a first side of the antenna element, a second tuning conductor spaced apart from the antenna element on a second side of the antenna element, a first ground tuning pad configured to receive a ground voltage, and a first switch electrically connected between the first tuning conductor and the first ground tuning pad. The first switch is operable to selectively connect the first tuning conductor to the first ground tuning pad to thereby tune the antenna element.

Abstract: An antenna structure with wide radiation bandwidth in a reduced physical space includes a metallic housing, a first feed portion, and a second feed portion. The metallic housing includes a metallic side frame and a metallic back board. The metallic side frame defines a slot, and first and second gaps. The metallic side frame between the first gap and one end of the slot forms a first radiation portion. The second gap divides the first radiation portion into first and second radiation sections. The first feed portion feeds current and signal to the first radiation section, and the first radiation section works in a GPS mode and a WIFI 2.4 GHz mode. The second feed portion feeds current and signal to the second radiation section, and the second radiation section works in a WIFI 5 GHz mode.

Abstract: An electronic device according to a certain embodiments comprises: a housing including a front plate, a rear plate, and a side member surrounding a space between the front plate and the rear plate; an antenna module disposed in the space, and configured to transmit and receive first signals belonging to a first frequency band using at least one antenna element; a nonconductive member disposed to face at least one surface of the antenna module; and a conductive pattern being closer to the rear plate than to the at front plate and disposed between the nonconductive member and the rear plate, wherein the conductive pattern is configured to: change a radiation direction of at least a portion of the first signal and transmit and receive a second signal belonging to a second frequency band.

Abstract: An antenna includes: a dielectric layer having first and second surfaces opposite to each other; a radiating layer on the first surface, and having therein a slit; a first shielding layer on the second surface, and being electrically connected to the radiating layer; a first insulating layer on an upper side of the radiating layer; and a switch unit on an upper side of the first insulating layer, and corresponding to the slit. Each switch unit includes: a first electrode, a second insulating layer, a connecting portion, and a second electrode on the first insulating layer sequentially. Orthogonal projections of the first and second electrodes on the dielectric layer overlap each other. The connecting portion is connected to the second electrode to form a gap between the first and second electrodes. Orthogonal projections of the second electrode and a corresponding slit on the dielectric layer overlap each other.

Abstract: A printed circuit board can include a substrate layer, a first metal layer disposed over the substrate layer, a core layer disposed over the first metal layer, and a second metal layer disposed over the core layer, where the core layer defines a closed cavity between the first and second metal layers. Optionally, the cavity is filled with air and operates as an antenna.

Abstract: An electronic device including a housing, a display, an antenna structure positioned inside the housing, and a wireless communication circuit connected to the antenna structure, is provided. The antenna structure includes a dipole antenna element interposed between s-patch elements not to overlap with s-patch elements.

Abstract: The present disclosure relates to an electronic apparatus. The electronic apparatus includes a display panel in which an active area and a peripheral area are defined and an antenna with at least a portion overlapping the active area. The antenna includes a first pattern portion having a first characteristic impedance and a first mesh structure, a second pattern portion, and a third pattern portion. The second pattern portion is disposed adjacent to the first pattern portion and has a second characteristic impedance different from the first characteristic impedance and a second mesh structure. The third pattern portion is disposed adjacent to the second pattern portion and has a third characteristic impedance different from the second characteristic impedance and a third mesh structure. The second characteristic impedance has a value between the first characteristic impedance and the third characteristic impedance.

Abstract: Phased array antennas, such as a multi-function aperture, are limited in performance and reliability by traditional air-cooled thermal management systems. A fuel-cooled multi-function aperture passes engine fuel through channels within the ribs of the multi-function aperture to provide better heat transfer than can be achieved through air cooled systems. The increased heat transfer and thermal management results in a multi-function aperture with improved performance and reliability.

Abstract: A slot antenna comprising a first conductive structure, a second conductive structure, and an antenna feed coupled to the first conductive structure. The first conductive structure is wholly or partially enclosed by the second conductive structure and comprises a conductive surface and a non-conductive pattern. The non-conductive pattern comprises a longitudinal slot and a lateral slot extending at an angle from the longitudinal slot.

Abstract: The disclosed mobile electronic device may include a display, an enclosure supporting the display and comprising a conductive portion including at least one inward protrusion, and a ground plane positioned within the enclosure and comprising at least one channel, wherein the at least one inward protrusion extends within the at least one channel of the ground plane and a gap defined between the conductive portion of the enclosure and the ground plane forms a slot antenna that is configured to radiate electromagnetic signals through a portion of the display. Various other related methods and systems are also disclosed.

Abstract: An antenna structure with multiple frequency capabilities applied to an electronic device includes frame body, first feed point, a first switch point, and second switch point. The frame body has at least one portion made of metal material and defines two gaps. The frame body between gaps form a first radiation portion. The first feed point from a source feeds current and signal to the first radiation portion. The first switch point and the second switch point are located at two ends of the frame body adjacent to the first gap. The first switch point and the second switch point are grounded through a switch circuit.

Abstract: A flexible antenna may be used to transmit information from and receive information to an information handling system by folding the antenna into contact with an inside surface of a display chassis of the information handling system, an outside surface of the display chassis and the surface connecting them. The folded antenna configuration may permit the antenna to receive and transmit signals in any or almost any direction when the chassis (e.g., a laptop) is in an open position even though the antenna occupies only a very small space of the inside surface of the display chassis (i.e., permitting the screen to occupy nearly all of the inside surface of the display chassis without interference from the antenna) or in a closed position.

Abstract: An electronic device comprises: a front housing including a display on a front surface; a rear housing located on a rear surface of the front housing; an antenna clip coupled to the rear housing, wherein the antenna clip may comprise: a coupling body coupled to one end of the rear housing; a first contact portion extending from the coupling body and electrically connected to an external radiator, and a second contact portion electrically connected to a circuit board between the front housing and the rear housing. Other various embodiments may be possible.

Abstract: A flexible antenna is provided. The flexible antenna includes a cable comprising at least one conductor, and an antenna body comprising a protective layer and a flexible circuit layer. The flexible circuit layer including a non-conductive sheet, at least one conductive feed pad and at least one antenna element. The at least one antenna element is formed of a conductive particle based material comprising conductive particles dispersed in a binder so that at least a majority of the conductive particles are adjacent to, but do not touch, one another. The at least one antenna element is disposed between the protective layer and the flexible circuit layer. The at least one conductor of the cable is electrically connected to the at least one feed pad.

Abstract: An antenna structure includes a metal plate and a spiral radiator. The metal plate is provided with a first surface and a second surface that are disposed oppositely. An accommodating groove is formed in the metal plate and adjacent to the first surface. The spiral radiator is mounted in the accommodating groove and insulated from the metal plate, and the spiral radiator is provided with a feed end used to be connected to a feed source.

Abstract: A detection device that is capable of being attached to a through hole includes a main body portion, a detection portion, a cover portion, an insulation portion, and an oscillation portion. The main body portion has an insertion portion and a head portion. The detection portion is arranged in the insertion portion and detects the state of a fluid. The cover portion is arranged so as to form a gap with the head portion. The insulating portion has a lateral wall having a cylindrical shape. An oscillation portion is accommodated inside the insulation portion, and performs a wireless output of a detection result of the detection portion by using the head portion, the cover portion and the gap as a slot antenna.

Abstract: An antenna module includes first to third radiators and a ground radiator. The first radiator includes first and second sections and excites at a first frequency band. An extension direction of the first section, including a feeding end, is not parallel to an extension direction of the second section. The second radiator includes third and fourth sections. The third section extends from an intersection of the first and second sections. The third section excites at a second frequency band. The third radiator is disposed beside the first radiator and away from the second radiator. The ground radiator is disposed on one side of the first, second, and third radiators, and includes a ground end. The fourth section of the second radiator is connected to the third section and the ground radiator. The third radiator is connected to the ground end.

Abstract: Aspects described herein include devices, wireless communication apparatuses, methods, and associated operations for heatsinks integrating millimeter wave and non-millimeter wave operation. In some aspects, an apparatus comprising a millimeter wave (mmW) module is provided. The apparatus includes at least one mmW antenna and at least one mmW signal node configured to communicate a data signal in association with the at least one mmW antenna. The apparatus further includes mixing circuitry configured to convert between the data signal and a mmW signal for communications associated with the at least one mmW antenna. The apparatus further includes a heatsink comprising a non-mmW antenna and a non-mmW feed point coupled to the non-mmW antenna. The non-mmW feed point is configured to provide a signal path to the non-mmW antenna for a non-mmW signal. The heatsink is mechanically coupled to the mmW module.

Abstract: An antenna includes a housing, a first conductor group, and a power supply line. The housing includes a first surface including at least three first corner portions, a second surface including at least three second corner portions and facing the first surface, and a side surface connecting the first and second surfaces. A housing portion is surrounded by the first, second and side surfaces. The first conductor group includes a first conductor extending along the first surface, at least three second conductors separated from one another, and a second conductor group. The second conductors extend along the side surface from the first corner portions to the second corner portions and are electrically connected to the first conductor. The second conductor group extends along the second surface and capacitively couples the at least three second conductors. The power supply line is connected to any one portion of the second conductor group.

Abstract: An electronic device includes a housing including a first plate and a second plate; and a first antenna structure. The first antenna structure includes a board disposed between the first plate and the second plate. The board includes a first surface facing the first plate, a second surface facing the second plate, a plurality of insulating layers stacked on top of each other between the first surface and the second surface, a first conductive layer disposed on the first surface, a second conductive layer disposed on the second surface, a plurality of strips disposed between the plurality of insulating layers, and a plurality of vias connecting at least one or more of the first conductive layer, the second conductive layer, or the plurality of strips to each other and disposed in the plurality of insulating layers.

Abstract: A four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide, includes a flexible base. A ground plane, a radiation patch and a feeder are arranged on the flexible base. There are several resonant tanks on the feeder and the radiation patch. The flexible base is made of insulating flexible material, and the feeder, the radiation patch and the ground plane are made of conductive flexible material. The four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide of the present application can be prepared by layer-by-layer assembly technology, spray printing or printed circuit board technology, and has the advantages of miniaturization and low profile, compact structure, convenient production, good conformality, wearable and other advantages.

Abstract: The present disclosure relates to antenna. One example antenna includes a radiating element, a reflecting element, and a radio frequency coaxial cable. The radiating element and the reflecting element are located on a same plane, and the radiating element is connected to the radio frequency coaxial cable. The reflecting element is of a comb structure, the comb structure includes at least two comb teeth, sizes of all the comb teeth are the same, intervals between every two adjacent comb teeth are the same, and a comb-like opening face of the reflecting element is opposite to the radiating element.

Abstract: An antenna system includes an antenna body having one or more connection points between the antenna body and a ground; a tunable component having a changeable operating parameter that is a capacitance or a inductance, wherein the antenna body is connected to the tunable component through a first connection point; and a first filter, wherein the first filter are connected to the antenna body; wherein the first filter is connected in parallel with the tunable component, wherein a first end of the first filter is connected to the antenna body through the first connection point, and a second end of the first filter is connected to the ground, and wherein the first filter presents a high impedance characteristic in a low frequency band, and presents a low impedance characteristic in a high frequency band.

Abstract: An antenna has an exciting element disposed above a ground plane of an electronic device. Power fed to the exciting element excites the ground plane to generate radiation. In this way, radiation capability of the ground plane is not affected by clearance between a display screen and the ground plane, and the antenna is applicable to an electronic device with limited antenna space. In addition, the ground plane serves as a radiation aperture of the electronic device.

Abstract: An electronic device is provided. The electronic device includes an outer housing that comprises a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a side surface surrounding a space between the first surface and the second surface, a display adapted to expose at least a portion of the display through the first surface of the outer housing, a PCB arranged between the second surface and the display in an interior of the outer housing, a communication circuit arranged on or over the PCB, a first conductive structure formed of at least one of the first surface or at least a portion of the side surface is electrically connected to the communication circuit, and a second conductive structure formed of the portion of the display electrically connected to the first conductive structure.

Abstract: A radio wave radiating device includes: a radio wave supply unit extending in one direction, one end of the radio wave supply unit being connected to a power source, an earth part spaced apart from the radio wave supply unit by a predetermined distance in a direction intersecting with the one direction, extending in the one direction, one end of the earth part being connected to a ground, and a radiating element connected to another end of the radio wave supply unit and another end of the earth part, respectively, and configured to radiate a radio wave received from the radio wave supply unit. The radiating element includes a middle portion connecting the radio wave supply unit and the earth part, a first radiating portion extending in a direction away from the earth part, and a second radiating portion extending in a direction away from the radio wave supply unit.

Abstract: An electronic device is provided. The electronic device includes a housing, a substrate disposed in an internal space of the housing, a battery disposed on a plane identical with a plane of the substrate, a support structure disposed to at least partially overlap the substrate when the substrate is viewed from a top, an antenna structure configured to include a dielectric substrate and at least one coil member disposed in the dielectric substrate as an antenna disposed to at least partially overlap the battery when the battery is viewed from the top, a tape member configured to include a first region at least partially overlapping the support structure, a second region at least partially overlapping the antenna structure, and a connection part connecting the first region and the second region when the support structure is viewed from the top.

Abstract: An electronic device is provided. The electronic device may include a first housing including a first conductive part and a second conductive part spaced apart from the first conductive part, a second housing including a third conductive part and a fourth conductive part spaced apart from the third conductive part, a connection structure connected to the first housing and the second housing, respectively, a first switch to selectively and electrically connect the first conductive part to the second conductive part, a second switch to selectively and electrically connect the third conductive part to the fourth conductive part, a first connection to electrically connect the first conductive part to the third conductive part in the first state of the electronic device, a second connection to electrically connect the second conductive part to the fourth conductive part in the first state and a wireless communication circuit.

Abstract: A radio frequency (RF) system and a communication device are provided. The RF system includes a flexible circuit board, a first antenna module and a RF module. The flexible circuit board has a first surface and a second surface, and the first surface and the second surface are located at different sides of the flexible circuit board. The first antenna module is disposed on the first surface of the flexible circuit board. The first antenna module includes a first carrier, a first antenna element disposed on or in the first carrier, and a first conductive member between the first carrier and the flexible circuit board. The RF module is disposed on the second surface of the flexible circuit board and electrically connected to the first antenna module.

Abstract: A remote communication system includes a portable device; and a fixed system. The fixed system includes main communication modules; and a position estimating unit configured to estimate a position of the portable device, based on an incident angle of a signal from the portable device, upon detecting the signal by antennas provided in the main communication modules. When there are two main communication modules for which the incident angle is known, the position of the portable device is estimated based on the incident angle. When there is one main communication module for which the incident angle is known, the position of the portable device is estimated based on the incident angle and a received radio wave intensity of the signal. When there is no main communication module for which the incident angle is known, the position of the portable device is estimated based on the received radio wave intensity.