JP2012227850A - Portable radio terminal - Google Patents

Portable radio terminal Download PDF

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Publication number
JP2012227850A
JP2012227850A JP2011095740A JP2011095740A JP2012227850A JP 2012227850 A JP2012227850 A JP 2012227850A JP 2011095740 A JP2011095740 A JP 2011095740A JP 2011095740 A JP2011095740 A JP 2011095740A JP 2012227850 A JP2012227850 A JP 2012227850A
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Japan
Prior art keywords
metal frame
housing
antenna element
wireless terminal
antenna
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JP2011095740A
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Japanese (ja)
Inventor
Kenji Ogawa
賢二 小川
Yoshio Koyanagi
芳雄 小柳
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Panasonic Corp
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Panasonic Corp
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Priority to JP2011095740A priority Critical patent/JP2012227850A/en
Priority to PCT/JP2012/002653 priority patent/WO2012144197A1/en
Publication of JP2012227850A publication Critical patent/JP2012227850A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Telephone Set Structure (AREA)
  • Details Of Aerials (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a portable radio terminal which can suppress antenna performance deterioration when a housing is held by a hand.SOLUTION: A platy first metal frame 8 is provided on a side surface of a housing 2, and a second metal frame 9 is provided at a position near a feeding portion 6 and keeping an interval portion 10 from the first metal frame 8. The first metal frame 8 is grounded near four corner portions 4a-4d of a circuit substrate 4, and the second metal frame 9 is not grounded. The interval portion 10 between the first metal frame 8 and the second metal frame 9 is disposed so as to expose on the side surface near a corner portion 2a of the housing 2. By adopting such a structure, antenna performance deterioration when the housing is held by a hand can be suppressed. In a free space, the second metal frame 9 does not influence on an antenna element 7, so that the performance of the antenna can be improved in both of the free space state and the handheld state.

Description

本発明は、ストレート型の筐体を有する携帯無線端末に関する。   The present invention relates to a portable wireless terminal having a straight casing.

上述したストレート型の筐体を有する携帯無線端末として、例えば特許文献１に記載された携帯無線機がある。また、近年めざましく普及しているスマートフォンと呼ばれる携帯無線端末も同様の形状を成している。スマートフォンは、携帯電話とＰＤＡ（Personal Digital Assistant）を融合させたものであり、携帯電話としての無線通信機能の他に、無線ＬＡＮ機能、スケジュール機能、個人情報管理機能などの多種多様な機能を有している。   As a portable wireless terminal having the above-described straight type casing, for example, there is a portable wireless device described in Patent Document 1. In addition, portable wireless terminals called smartphones that have become extremely popular in recent years have the same shape. A smartphone is a combination of a mobile phone and a PDA (Personal Digital Assistant), and has various functions such as a wireless LAN function, a schedule function, and a personal information management function in addition to a wireless communication function as a mobile phone. doing.

ところで、上述した特許文献１に記載された携帯無線機では、アンテナを筐体の上端部に設けているが、ＳＡＲ（Specific Absorption Rate、比吸収率）設計上の観点からすると、筐体の下端部に配置するのが望ましい。
なお、携帯無線端末用のアンテナとして、例えば特許文献２に記載された無給電素子付板状アンテナがある。 By the way, in the portable wireless device described in Patent Document 1 described above, the antenna is provided at the upper end of the housing. From the viewpoint of SAR (Specific Absorption Rate) design, the lower end of the housing It is desirable to arrange in the part.
As an antenna for a portable wireless terminal, for example, there is a plate antenna with a parasitic element described in Patent Document 2.

特開２００８−０７２４８６号公報JP 2008-072486 A 特開平６−３３４４２０号公報JP-A-6-334420

しかしながら、ＳＡＲ設計上の観点からアンテナを筐体の下端部に配置した場合、実使用時にアンテナが手で覆われることになり、インピーダンスの共振周波数が低下して、アンテナ性能が劣化する懸念がある。   However, from the viewpoint of SAR design, when the antenna is arranged at the lower end of the housing, the antenna is covered with hands during actual use, and there is a concern that the resonance frequency of the impedance is lowered and the antenna performance is deteriorated. .

前述した特許文献１に記載された携帯無線機のアンテナは、地線の共振周波数において、実使用時における人体によるアンテナ性能劣化が大きい。また、前述した特許文献２に記載された無給電素子付板状アンテナは、手での保持を想定した設計が成されていないため、手での保持時に大幅なアンテナ性能劣化（具体的には、利得が低下する）が予想される。   The antenna of the portable wireless device described in Patent Document 1 described above has a large antenna performance degradation due to the human body during actual use at the resonance frequency of the ground wire. In addition, the plate-like antenna with a parasitic element described in Patent Document 2 described above is not designed to be held by hand, so that significant antenna performance degradation (specifically, when held by hand) , The gain decreases).

本発明は、係る事情に鑑みてなされたものであり、筐体の手持ち時のアンテナ性能劣化を低く抑えることができる携帯無線端末を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a portable wireless terminal that can suppress deterioration in antenna performance when the case is held by hand.

本発明の携帯無線端末は、筐体と、前記筐体に設けられた操作部と、前記筐体の内部に設けられ、グランドを有する回路基板と、前記回路基板上に実装された無線回路部と、前記無線回路部に接続された給電部と、前記給電部に接続され、前記無線回路部の動作周波数に励振するアンテナ素子と、前記筐体に設けられ、少なくとも前記給電部近傍で接地された板状の第１の金属フレームと、前記筐体に設けられ、かつ前記給電部の近傍に設けられた、非接地の第２の金属フレームと、前記第１の金属フレームと前記第２の金属フレームとの間に所定の間隔を設けた間隙部と、を備え、前記間隙部は、前記筐体の表面上に露出し、前記筐体の角近傍の側面もしくは前記操作部と反対面に位置することを特徴とする。   The portable wireless terminal of the present invention includes a housing, an operation unit provided in the housing, a circuit board provided in the housing and having a ground, and a wireless circuit unit mounted on the circuit board. A power supply unit connected to the wireless circuit unit, an antenna element connected to the power supply unit and excited at an operating frequency of the wireless circuit unit, and provided in the housing, and grounded at least near the power supply unit A plate-shaped first metal frame, a non-grounded second metal frame provided in the housing and in the vicinity of the power feeding unit, the first metal frame, and the second metal frame A gap provided with a predetermined gap between the metal frame, the gap exposed on the surface of the casing, and on a side surface near a corner of the casing or on a surface opposite to the operation section. It is characterized by being located.

上記構成によれば、筐体に、板状の第１の金属フレームを設けるとともに、給電部の近傍で、かつ第１の金属フレームから間隙部を隔てて第２の金属フレームを設け、第１の金属フレームを、少なくとも給電部近傍で接地し、第２の金属フレームを非接地とし、さらに、間隙部を、筐体の表面上に露出させるとともに、筐体の角近傍の側面もしくは操作部と反対面に位置させたので、筐体の手保持状態において、間隙部に手が触れることで、第１の金属フレームと第２の金属フレームが高周波的に接続されて、第２の金属フレームがグランドとなり、手がアンテナ素子に近接することによる共振周波数の低周波数化（ずれ）を抑制することが可能となる。これは、グランドとアンテナ素子との近接による共振周波数の高周波化する原理を利用したものであり、手がアンテナ素子に近接することによる共振周波数の低周波化を抑制することができる。   According to the above configuration, the housing is provided with the plate-like first metal frame, and the second metal frame is provided in the vicinity of the power feeding unit and with the gap from the first metal frame. The metal frame is grounded at least in the vicinity of the power feeding unit, the second metal frame is ungrounded, and the gap is exposed on the surface of the housing, and the side surface or the operation unit near the corner of the housing Since it is located on the opposite surface, the first metal frame and the second metal frame are connected at a high frequency when the hand touches the gap in the hand-holding state of the housing, and the second metal frame is It becomes a ground, and it is possible to suppress a decrease (shift) in the resonance frequency due to the hand approaching the antenna element. This utilizes the principle of increasing the resonance frequency due to the proximity of the ground and the antenna element, and can suppress the decrease in the resonance frequency due to the proximity of the hand to the antenna element.

また、自由空間では第２の金属フレームはアンテナ素子に影響を与えることがないため、自由空間と手保持の双方の状態でアンテナの高性能化を実現できる。   In addition, since the second metal frame does not affect the antenna element in free space, the performance of the antenna can be improved in both free space and hand-held states.

上記構成において、前記間隙部の寸法は、前記無線回路部の動作周波数の０．１波長以下である。   In the above configuration, the size of the gap is not more than 0.1 wavelength of the operating frequency of the radio circuit unit.

上記構成において、前記アンテナ素子と前記第２の金属フレームとの間隔は、前記無線回路部の動作周波数の０．１波長以下である。   In the above configuration, an interval between the antenna element and the second metal frame is 0.1 wavelength or less of an operating frequency of the radio circuit unit.

上記構成において、前記第２の金属フレームの長さは、前記無線回路部の動作周波数の０．２５波長以下０．０２５波長以上である。   In the above configuration, the length of the second metal frame is 0.25 wavelength or less and 0.025 wavelength or more of the operating frequency of the radio circuit unit.

上記構成において、前記第１の金属フレーム及び前記第２の金属フレームの少なくともいずれか一方は、前記筐体より露出している。   In the above configuration, at least one of the first metal frame and the second metal frame is exposed from the housing.

上記構成において、前記第１の金属フレーム及び前記第２の金属フレームの少なくともいずれか一方は、前記筐体の一部である。   In the above configuration, at least one of the first metal frame and the second metal frame is a part of the housing.

上記構成において、前記第２の金属フレームは、前記筐体の内部に設けられた寄生素子と電気的に接続する。   In the above configuration, the second metal frame is electrically connected to a parasitic element provided in the housing.

上記構成によれば、筐体の内部に設けられた寄生素子を第２の金属フレームに接続することで、アンテナ素子の長さなどの設計の自由度を高めることができる。   According to the above configuration, the degree of freedom in design such as the length of the antenna element can be increased by connecting the parasitic element provided in the housing to the second metal frame.

上記構成において、前記第２の金属フレームは、前記アンテナ素子と電気的に接続する。   In the above configuration, the second metal frame is electrically connected to the antenna element.

上記構成によれば、第２の金属フレームをアンテナ素子に電気的に接続することで、アンテナ素子の長さなどの設計の自由度を高めることができる。   According to the said structure, the freedom degree of design, such as the length of an antenna element, can be raised by electrically connecting a 2nd metal frame to an antenna element.

上記構成において、前記第２の金属フレームは、集中定数素子を介して前記アンテナ素子と電気的に接続する。   In the above configuration, the second metal frame is electrically connected to the antenna element through a lumped constant element.

上記構成によれば、第２の金属フレームを、集中定数素子を介してアンテナ素子に電気的に接続することで、アンテナ素子の長さなどの設計の自由度を高めることができる。   According to the above configuration, the second metal frame is electrically connected to the antenna element via the lumped constant element, thereby increasing the degree of design freedom such as the length of the antenna element.

本発明によれば、筐体の手持ち時のアンテナ性能劣化を低く抑えることができる。   According to the present invention, it is possible to suppress deterioration in antenna performance when the housing is held by hand.

本発明の実施の形態１に係る携帯無線端末の概観を示す斜視図1 is a perspective view showing an overview of a portable wireless terminal according to Embodiment 1 of the present invention. 図１の携帯無線端末を示す要部構成図Main part block diagram which shows the portable radio | wireless terminal of FIG. 図１の携帯無線端末において、３つの方向を持つ形状の間隙部を示す図The figure which shows the gap | interval part of a shape with three directions in the portable radio | wireless terminal of FIG. 本発明の実施の形態２に係る携帯無線端末を示す要部構成図Main part block diagram which shows the portable radio | wireless terminal which concerns on Embodiment 2 of this invention 本発明の実施の形態３に係る携帯無線端末を示す要部構成図Main part block diagram which shows the portable radio | wireless terminal which concerns on Embodiment 3 of this invention. 図５の携帯無線端末の応用例であって、集中定数素子を介在させた場合の携帯無線端末を示す要部構成図FIG. 6 is a main part configuration diagram showing an example of application of the portable wireless terminal of FIG. 5 and showing the portable wireless terminal when a lumped constant element is interposed

以下、本発明を実施するための好適な実施の形態について、図面を参照して詳細に説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

（実施の形態１）
図１は、本発明の実施の形態１に係る携帯無線端末の概観を示す斜視図である。また、図２は、図１の携帯無線端末を示す要部構成図である。なお、図１では、携帯無線端末の１箇所で内部を露出させて各部材が見えるようにしている。 (Embodiment 1)
FIG. 1 is a perspective view showing an overview of a portable wireless terminal according to Embodiment 1 of the present invention. FIG. 2 is a main part configuration diagram showing the portable radio terminal of FIG. In FIG. 1, the inside is exposed at one place of the portable wireless terminal so that each member can be seen.

図１及び図２において、本実施の形態の携帯無線端末１は、スマートフォンと呼ばれる携帯無線機であり、ストレート型の筐体２と、筐体２の２つの幅広面の一方の側に設けられた表示・操作部３と、筐体２の内部に設けられ、グランド（図示略）を有する回路基板４と、回路基板４上に実装された無線回路部５と、無線回路部５に接続された給電部６（図２参照）と、給電部６に接続され、無線回路部５の動作周波数に励振するアンテナ素子７（図２参照）と、筐体２の側面上であって、該側面に沿って設けられ、回路基板４の四つの角部４ａ〜４ｄのそれぞれの近傍で接地された板状の第１の金属フレーム８と、筐体２の側面上で給電部６近傍に設けられ、グランドへの接地を行っていない非接地の第２の金属フレーム９と、第１の金属フレーム８と第２の金属フレーム９との間に所定の間隔を設けて得た間隙部１０と、を備える。   1 and 2, the portable wireless terminal 1 of the present embodiment is a portable wireless device called a smartphone, and is provided on one side of a straight-type casing 2 and two wide surfaces of the casing 2. The display / operation unit 3, the circuit board 4 provided inside the housing 2 and having a ground (not shown), the radio circuit unit 5 mounted on the circuit board 4, and the radio circuit unit 5. The power supply unit 6 (see FIG. 2), the antenna element 7 (see FIG. 2) that is connected to the power supply unit 6 and excites the operating frequency of the radio circuit unit 5, and the side surface of the housing 2 And a plate-like first metal frame 8 grounded in the vicinity of each of the four corners 4 a to 4 d of the circuit board 4, and provided near the power feeding unit 6 on the side surface of the housing 2. A non-grounded second metal frame 9 not grounded to the ground, and a first metal Comprising frame 8 and the gap 10 which is obtained by providing a predetermined gap between the second metal frame 9, a.

第１，第２の金属フレーム８，９に使用する材料としては、例えばアルミニウム、マグネシウム合金、ステンレス、銅箔（金属箔）などの金属が好適である。表示・操作部３は、ＬＣＤ（Liquid Crystal Display）等の液晶表示器（図示略）とその表面側に配置されたタッチパネル（図示略）とから構成される。第２の金属フレーム９の長さは、無線回路部５の動作周波数の０．２５波長以下０．０２５波長以上である。また、間隙部１０の寸法は、無線回路部５の動作周波数の０．１波長以下である。また、アンテナ素子７と第２の金属フレーム９との間隔は、無線回路部５の動作周波数の０．１波長以下である。アンテナ素子７は、筐体２の内部で、筐体２の下端部に設けられている。   The material used for the first and second metal frames 8 and 9 is preferably a metal such as aluminum, magnesium alloy, stainless steel, copper foil (metal foil), or the like. The display / operation unit 3 includes a liquid crystal display (not shown) such as an LCD (Liquid Crystal Display) and a touch panel (not shown) arranged on the surface side thereof. The length of the second metal frame 9 is 0.25 wavelength or less and 0.025 wavelength or more of the operating frequency of the radio circuit unit 5. The dimension of the gap 10 is not more than 0.1 wavelength of the operating frequency of the radio circuit unit 5. Further, the distance between the antenna element 7 and the second metal frame 9 is equal to or less than 0.1 wavelength of the operating frequency of the radio circuit unit 5. The antenna element 7 is provided at the lower end of the housing 2 inside the housing 2.

本実施の形態の携帯無線端末１は、このような構成を採り、筐体２を手で保持した状態すなわち手保持状態において、間隙部１０に手が触れることで、該手を介して第１の金属フレーム８と第２の金属フレーム９とが高周波的に接続されて、第２の金属フレーム９が無線回路部５のグランドに接地される。第２の金属フレーム９が接地されることで、手がアンテナ素子７に近接することによる共振周波数の低周波数化（ずれ）が抑制される。すなわち、無線回路部５のグランドとアンテナ素子７を近接させることで共振周波数が高周波化する原理を利用することで、筐体２の手保持状態において共振周波数の低周波化を抑制することができる。   The portable wireless terminal 1 according to the present embodiment adopts such a configuration, and in a state where the casing 2 is held by hand, that is, in a hand-held state, the hand touches the gap portion 10, so that the first through the hand. The metal frame 8 and the second metal frame 9 are connected to each other at a high frequency, and the second metal frame 9 is grounded to the ground of the radio circuit unit 5. Since the second metal frame 9 is grounded, lowering (shift) of the resonance frequency due to the hand approaching the antenna element 7 is suppressed. That is, by using the principle that the resonance frequency is increased by bringing the ground of the radio circuit unit 5 and the antenna element 7 close to each other, it is possible to suppress a decrease in the resonance frequency in the hand-holding state of the housing 2. .

また、自由空間では第２の金属フレーム９がアンテナ素子７に影響を与えることがないため、自由空間と手保持の双方の状態でアンテナの高性能化を実現できる。   In addition, since the second metal frame 9 does not affect the antenna element 7 in free space, high performance of the antenna can be realized in both free space and hand-held states.

このように本実施の形態の携帯無線端末１によれば、筐体２の側面に、板状の第１の金属フレーム８を有するとともに、給電部６の近傍で、かつ第１の金属フレーム８から間隙部１０を隔てた位置に第２の金属フレーム９を有し、第１の金属フレーム８を回路基板４の四つの角部４ａ〜４ｄのそれぞれの近傍で接地し、第２の金属フレーム９を非接地とし、さらに、第１の金属フレーム８と第２の金属フレーム９との間の間隙部１０を、筐体２の角部２ａ近傍の側面上に露出させて配置した構成を採ったので、筐体の手持ち時のアンテナ性能劣化を低く抑えることができる。また、自由空間では第２の金属フレーム９はアンテナ素子７に影響を与えることがないことから、自由空間と手保持の双方の状態でアンテナの高性能化を実現できる。   As described above, according to the portable wireless terminal 1 of the present embodiment, the first metal frame 8 having the plate-like first metal frame 8 on the side surface of the housing 2 and in the vicinity of the power feeding unit 6 is provided. The second metal frame 9 is provided at a position separating the gap 10 from the first metal frame 8, and the first metal frame 8 is grounded in the vicinity of each of the four corners 4a to 4d of the circuit board 4, and the second metal frame 9 is ungrounded, and the gap 10 between the first metal frame 8 and the second metal frame 9 is exposed on the side surface in the vicinity of the corner 2a of the housing 2 and arranged. Therefore, the antenna performance degradation when the case is held by hand can be kept low. In addition, since the second metal frame 9 does not affect the antenna element 7 in free space, high performance of the antenna can be realized in both free space and hand-held states.

なお、本実施の形態の携帯無線端末１では、第１の金属フレーム８を回路基板４の四つの角部４ａ〜４ｄのそれぞれの近傍で接地させたが、少なくとも給電部６の近傍で接地してあればよい。   In the mobile wireless terminal 1 of the present embodiment, the first metal frame 8 is grounded in the vicinity of each of the four corners 4a to 4d of the circuit board 4, but is grounded at least in the vicinity of the power feeding unit 6. If there is.

また、本実施の形態の携帯無線端末１では、間隙部１０を筐体２の角近傍の側面に配置したが、表示・操作部３と反対面に配置してもよい。   Further, in the portable wireless terminal 1 of the present embodiment, the gap 10 is arranged on the side surface near the corner of the housing 2, but it may be arranged on the surface opposite to the display / operation unit 3.

また、本実施の形態の携帯無線端末１では、第１の金属フレーム８と第２の金属フレーム９を筐体２の側面上に設けて筐体２より露出させているが、第１の金属フレーム８と第２の金属フレーム９のいずれも筐体２の内側に設けても良いし、いずれか一方を筐体２の内側に設けてもよい。   In the portable wireless terminal 1 of the present embodiment, the first metal frame 8 and the second metal frame 9 are provided on the side surface of the housing 2 and are exposed from the housing 2. Either the frame 8 or the second metal frame 9 may be provided inside the housing 2, or one of them may be provided inside the housing 2.

また、本実施の形態の携帯無線端末１では、第１の金属フレーム８と第２の金属フレーム９を筐体２とは別体のものとしたが、第１の金属フレーム８及び第２の金属フレーム９を筐体そのものとしてもよいし、少なくともいずれか一方を筐体２の一部としてもよい。特に、第１の金属フレーム８及び第２の金属フレーム９を筐体そのものとする場合、十分な厚みを持たせるとよい。   In the portable wireless terminal 1 according to the present embodiment, the first metal frame 8 and the second metal frame 9 are separate from the housing 2. However, the first metal frame 8 and the second metal frame 9 are separate from the housing 2. The metal frame 9 may be the housing itself, or at least one of them may be a part of the housing 2. In particular, when the first metal frame 8 and the second metal frame 9 are used as the casings themselves, it is preferable to have a sufficient thickness.

また、本実施の形態の携帯無線端末１では、第１の金属フレーム８と第２の金属フレーム９の突き合わせ部分で形成される間隙部１０の形状を矩形としたが、この形状に限定されるものではなく、２つ以上の方向を持つ形状としてもよい。図３は、３つの方向を持つ形状の間隙部１０Ａを示す図である。このように間隙部１０の形状に（例えば２次元的に）自由度を持たせることで、手保持時における第１の金属フレーム８と第２の金属フレーム９との間の接続のし易さを改善できる。   Moreover, in the portable wireless terminal 1 of the present embodiment, the shape of the gap portion 10 formed by the butted portion of the first metal frame 8 and the second metal frame 9 is rectangular, but the shape is limited to this shape. It is good also as a shape with two or more directions instead of a thing. FIG. 3 is a diagram showing a gap 10A having a shape having three directions. In this way, by providing the shape of the gap 10 with a degree of freedom (for example, two-dimensionally), it is easy to connect the first metal frame 8 and the second metal frame 9 during hand holding. Can be improved.

（実施の形態２）
図４は、本発明の実施の形態２に係る携帯無線端末を示す要部構成図である。なお、図４において前述した図１及び図２と共通する部分には同一の符号を付けてその説明を省略する。
図４において、本実施の形態の携帯無線端末２０は、第２の金属フレーム９と電気的に接続される寄生素子２１を備えている。この寄生素子２１は、筐体２の内部に設けられ、接続部２２を介して第２の金属フレーム９の一端に接続される。寄生素子２１には、板金又はフレキシブルパターンサーキット（“フレキ基板”と呼ばれる）が用いられる。筐体２の内部に設けた寄生素子２１を第２の金属フレーム９に接続することで、アンテナ素子７の長さなどの設計の自由度を高めることができる。 (Embodiment 2)
FIG. 4 is a main part configuration diagram showing a mobile radio terminal according to Embodiment 2 of the present invention. 4 that are the same as those in FIGS. 1 and 2 described above are denoted by the same reference numerals and description thereof is omitted.
In FIG. 4, the mobile radio terminal 20 of the present embodiment includes a parasitic element 21 that is electrically connected to the second metal frame 9. The parasitic element 21 is provided inside the housing 2 and connected to one end of the second metal frame 9 via the connection portion 22. As the parasitic element 21, a sheet metal or a flexible pattern circuit (referred to as a “flexible substrate”) is used. By connecting the parasitic element 21 provided inside the housing 2 to the second metal frame 9, the degree of freedom in design such as the length of the antenna element 7 can be increased.

（実施の形態３）
図５は、本発明の実施の形態３に係る携帯無線端末を示す要部構成図である。なお、図５において前述した図１及び図２と共通する部分には同一の符号を付けてその説明を省略する。
図５において、本実施の形態の携帯無線端末３０は、第２の金属フレーム９を、接続部３１を介してアンテナ素子７に電気的に接続したものである。第２の金属フレーム９をアンテナ素子７に電気的に接続することで、アンテナ素子７の長さなどの設計の自由度を高めることができる。 (Embodiment 3)
FIG. 5 is a main part configuration diagram showing a mobile radio terminal according to Embodiment 3 of the present invention. 5 that are the same as those in FIGS. 1 and 2 described above are denoted by the same reference numerals and description thereof is omitted.
In FIG. 5, the portable radio terminal 30 of the present embodiment is one in which the second metal frame 9 is electrically connected to the antenna element 7 via the connection portion 31. By electrically connecting the second metal frame 9 to the antenna element 7, the design freedom such as the length of the antenna element 7 can be increased.

なお、アンテナ素子７と接続部３１との間に集中定数素子を介在させてもよい。図６は、集中定数素子３２を介在させた場合の携帯無線端末３０を示す要部構成図である。第２の金属フレーム９を、集中定数素子３２を介してアンテナ素子７と電気的に接続することで、アンテナ素子７の長さなどの設計の自由度を高めることができる。   Note that a lumped element may be interposed between the antenna element 7 and the connection portion 31. FIG. 6 is a main part configuration diagram showing the portable wireless terminal 30 when the lumped constant element 32 is interposed. By electrically connecting the second metal frame 9 to the antenna element 7 through the lumped constant element 32, the degree of design freedom such as the length of the antenna element 7 can be increased.

本発明は、筐体の手持ち時のアンテナ性能劣化を低く抑えることができるといった効果を有し、スマートフォンなどのストレート型の筐体を有する携帯無線端末への適用が可能である。   INDUSTRIAL APPLICABILITY The present invention has an effect of suppressing deterioration of antenna performance when the case is held by hand, and can be applied to a portable wireless terminal having a straight type case such as a smartphone.

１，２０，３０ 携帯無線端末
２ 筐体
３ 表示・操作部
４ 回路基板
５ 無線回路部
６ 給電部
７ アンテナ素子
８ 第１の金属フレーム
９ 第２の金属フレーム
１０，１０Ａ 間隙部
２１ 寄生素子
２２，３１ 接続部
３２ 集中定数素子 DESCRIPTION OF SYMBOLS 1,20,30 Portable radio | wireless terminal 2 Case 3 Display / operation part 4 Circuit board 5 Wireless circuit part 6 Electric power feeding part 7 Antenna element 8 1st metal frame 9 2nd metal frame 10, 10A Gap part 21 Parasitic element 22 , 31 Connection 32 Lumped constant element

Claims (9)

筐体と、
前記筐体に設けられた操作部と、
前記筐体の内部に設けられ、グランドを有する回路基板と、
前記回路基板上に実装された無線回路部と、
前記無線回路部に接続された給電部と、
前記給電部に接続され、前記無線回路部の動作周波数に励振するアンテナ素子と、
前記筐体に設けられ、少なくとも前記給電部近傍で接地された板状の第１の金属フレームと、
前記筐体に設けられ、かつ前記給電部の近傍に設けられた、非接地の第２の金属フレームと、
前記第１の金属フレームと前記第２の金属フレームとの間に所定の間隔を設けた間隙部と、
を備え、
前記間隙部は、前記筐体の表面上に露出し、前記筐体の角近傍の側面もしくは前記操作部と反対面に位置することを特徴とする携帯無線端末。 A housing,
An operation unit provided in the housing;
A circuit board provided in the housing and having a ground;
A wireless circuit unit mounted on the circuit board;
A power feeding unit connected to the wireless circuit unit;
An antenna element connected to the power feeding unit and excited at an operating frequency of the radio circuit unit;
A plate-shaped first metal frame provided in the housing and grounded at least near the power feeding unit;
A non-grounded second metal frame provided in the housing and provided in the vicinity of the power feeding unit;
A gap provided with a predetermined interval between the first metal frame and the second metal frame;
With
The portable wireless terminal is characterized in that the gap is exposed on the surface of the casing and is located on a side surface near the corner of the casing or on a surface opposite to the operation section. 前記間隙部の寸法は、前記無線回路部の動作周波数の０．１波長以下であることを特徴とする請求項１に記載の携帯無線端末。   The portable wireless terminal according to claim 1, wherein a size of the gap portion is 0.1 wavelength or less of an operating frequency of the wireless circuit portion. 前記アンテナ素子と前記第２の金属フレームとの間隔は、前記無線回路部の動作周波数の０．１波長以下であることを特徴とする請求項１又は請求項２に記載の携帯無線端末。   The portable wireless terminal according to claim 1 or 2, wherein a distance between the antenna element and the second metal frame is 0.1 wavelength or less of an operating frequency of the wireless circuit unit. 前記第２の金属フレームの長さは、前記無線回路部の動作周波数の０．２５波長以下０．０２５波長以上であることを特徴とする請求項１乃至請求項３のいずれか一項に記載の携帯無線端末。   4. The length of the second metal frame is 0.25 wavelength or less and 0.025 wavelength or more of an operating frequency of the radio circuit unit, according to claim 1. Mobile wireless terminals. 前記第１の金属フレーム及び前記第２の金属フレームの少なくともいずれか一方は、前記筐体より露出していることを特徴とする請求項１乃至請求項４のいずれか一項に記載の携帯無線端末。   5. The mobile radio according to claim 1, wherein at least one of the first metal frame and the second metal frame is exposed from the housing. 6. Terminal. 前記第１の金属フレーム及び前記第２の金属フレームの少なくともいずれか一方は、前記筐体の一部であることを特徴とする請求項１乃至請求項５のいずれか一項に記載の携帯無線端末。   The portable radio according to any one of claims 1 to 5, wherein at least one of the first metal frame and the second metal frame is a part of the housing. Terminal. 前記第２の金属フレームは、前記筐体の内部に設けられた寄生素子と電気的に接続することを特徴とする請求項１乃至請求項６のいずれか一項に記載の携帯無線端末。   The portable wireless terminal according to any one of claims 1 to 6, wherein the second metal frame is electrically connected to a parasitic element provided inside the housing. 前記第２の金属フレームは、前記アンテナ素子と電気的に接続することを特徴とする請求項１乃至請求項６のいずれか一項に記載の携帯無線端末。   The portable radio terminal according to any one of claims 1 to 6, wherein the second metal frame is electrically connected to the antenna element. 前記第２の金属フレームは、集中定数素子を介して前記アンテナ素子と電気的に接続することを特徴とする請求項８に記載の携帯無線端末。   The portable wireless terminal according to claim 8, wherein the second metal frame is electrically connected to the antenna element through a lumped constant element.
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US11942702B2 (en) 2019-11-07 2024-03-26 Fcnt Limited Wireless communication apparatus

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