JP6690820B2

JP6690820B2 - Electronics

Info

Publication number: JP6690820B2
Application number: JP2016155901A
Authority: JP
Inventors: 櫻井　実; 実櫻井
Original assignee: Fujitsu Connected Technologies Ltd
Current assignee: Fujitsu Connected Technologies Ltd
Priority date: 2016-08-08
Filing date: 2016-08-08
Publication date: 2020-04-28
Anticipated expiration: 2036-08-08
Also published as: JP2018026636A

Description

本開示は、電子機器に関する。 The present disclosure relates to electronic devices.

導電性を有するアンテナ部材が、導電性のある円筒状の部材によって筐体に対して支持され、アンテナ部材が円筒状の部材に対して変位可能であるアンテナ構造が知られている。 There is known an antenna structure in which an antenna member having conductivity is supported by a housing by a cylindrical member having conductivity, and the antenna member is displaceable with respect to the cylindrical member.

特開2001-257516号公報JP 2001-257516 JP 特開2004-228665号公報JP 2004-228665 JP

しかしながら、上記のような従来技術では、比較的簡易な構造で、２周波に対応することが難しい。例えば、特許文献２に記載の従来技術では、周波数を分けるダイプレクサ等が必要となり、無線回路部の構成の簡易化が難しい。 However, it is difficult for the above-described conventional techniques to support two frequencies with a relatively simple structure. For example, in the conventional technique disclosed in Patent Document 2, it is difficult to simplify the configuration of the wireless circuit unit because a diplexer for dividing the frequency is required.

そこで、１つの側面では、本発明は、比較的簡易な構造で、２周波に対応することを目的とする。 Therefore, in one aspect, the present invention aims to support two frequencies with a relatively simple structure.

一局面によれば、筐体と、
導電性を有するアンテナ部材と、
前記筐体に対して前記アンテナ部材を支持し、導電性を有する支持部材と、
前記アンテナ部材の長さ方向における前記支持部材の一端側に電気的に接続され、前記アンテナ部材と前記支持部材との間が電気的に接続される第１状態において、前記アンテナ部材及び前記支持部材により形成される前記長さ方向の長さに対応する第１周波数の電波に係る処理を行う第１無線回路部と、
前記長さ方向における前記支持部材の他端側に電気的に接続され、前記アンテナ部材と前記支持部材との間が電気的に切断される第２状態において、前記支持部材の長さに対応する第２周波数の電波に係る処理を行う第２無線回路部とを含む、電子機器が提供される。 According to one aspect, a housing,
An antenna member having conductivity,
A supporting member that supports the antenna member with respect to the housing and has conductivity;
In a first state in which the antenna member is electrically connected to one end side of the support member in the longitudinal direction, and the antenna member and the support member are electrically connected, the antenna member and the support member A first radio circuit unit that performs processing relating to radio waves of a first frequency corresponding to the length in the length direction formed by
Corresponding to the length of the support member in the second state in which the other end of the support member in the length direction is electrically connected and the antenna member and the support member are electrically disconnected from each other. An electronic device including a second wireless circuit unit that performs a process related to a radio wave of a second frequency is provided.

比較的簡易な構造で、２周波に対応することが可能となる。 It is possible to support two frequencies with a relatively simple structure.

実施例によるロッドアンテナの伸長状態を示す平面図である。It is a top view which shows the extension state of the rod antenna by an Example. 実施例によるロッドアンテナの格納状態を示す平面図である。It is a top view which shows the storage state of the rod antenna by an Example. ロッドアンテナの伸縮機構及び絶縁部材の機能の説明図である。It is explanatory drawing of the function of the expansion / contraction mechanism of a rod antenna, and an insulating member. ロッドアンテナの伸縮機構及び絶縁部材の機能の説明図である。It is explanatory drawing of the function of the expansion / contraction mechanism of a rod antenna, and an insulating member. ＤＴＶ回路を含むＤＴＶ放送受信部の一例を示すブロック図である。It is a block diagram which shows an example of the DTV broadcast receiving part containing a DTV circuit. Ｗｉ−Ｆｉ回路を含むＷｉ−Ｆｉ通信部の一例を示すブロック図である。It is a block diagram which shows an example of the Wi-Fi communication part containing a Wi-Fi circuit. 図１Ａに示す伸長状態におけるアンテナ動作原理の説明図である。It is explanatory drawing of the antenna operation principle in the extension state shown to FIG. 1A. 図１Ｂに示す収容状態におけるアンテナ動作原理の説明図である。It is explanatory drawing of the antenna operating principle in the accommodation state shown in FIG. 1B. ロッドアンテナの伸長状態における地上波デジタル放送に係るアンテナ特性の説明図である。It is explanatory drawing of the antenna characteristic concerning the terrestrial digital broadcasting in the extended state of the rod antenna. ロッドアンテナの伸長状態におけるＷｉ−Ｆｉに係るアンテナ特性の説明図である。It is explanatory drawing of the antenna characteristic concerning Wi-Fi in the extension state of a rod antenna. ロッドアンテナの収容状態におけるＷｉ−Ｆｉに係るアンテナ特性の説明図である。It is explanatory drawing of the antenna characteristic concerning Wi-Fi in the accommodation state of a rod antenna. ロッドアンテナの伸長状態におけるＤＴＶ回路とＷｉ−Ｆｉ回路との間のアイソレーションに関するシュミレーション結果を示す図である。It is a figure which shows the simulation result regarding the isolation between the DTV circuit and the Wi-Fi circuit in the extended state of a rod antenna. ロッドアンテナの伸長状態におけるＤＴＶ回路とＷｉ−Ｆｉ回路との間のアイソレーションが良好となる理由の説明図である。It is explanatory drawing of the reason why the isolation between the DTV circuit and the Wi-Fi circuit in the extended state of a rod antenna becomes favorable.

以下、添付図面を参照しながら各実施例について詳細に説明する。 Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings.

図１Ａ及び図１Ｂは、実施例による電子機器１を示す概略図であり、図１Ａは、ロッドアンテナの伸長状態を示す平面図であり、図１Ｂは、ロッドアンテナの格納状態を示す平面図である。図１Ａ及び図１Ｂでは、電子機器１の内部の構成要素について透視で点線により示される。以下では、図１Ａ及び図１Ｂに示すようにＹ方向を定義し、Ｙ１側を「上側」とし、Ｙ２側を「下側」とする。尚、Ｙ方向は、ロッドアンテナ２０の長さ方向に対応する。また、以下では、説明上、図１Ａ及び図１Ｂに示すようにＸ方向を定義する。 1A and 1B are schematic views showing an electronic device 1 according to an embodiment, FIG. 1A is a plan view showing an extended state of a rod antenna, and FIG. 1B is a plan view showing a retracted state of a rod antenna. is there. In FIG. 1A and FIG. 1B, the internal components of the electronic device 1 are shown by a dotted line in perspective. Hereinafter, the Y direction is defined as shown in FIGS. 1A and 1B, and the Y1 side is defined as “upper side” and the Y2 side is defined as “lower side”. The Y direction corresponds to the length direction of the rod antenna 20. Further, hereinafter, for the sake of explanation, the X direction is defined as shown in FIGS. 1A and 1B.

電子機器１は、無線通信機能を備える。尚、無線通信とは、電波による通信であり、例えば、電波を使用して行うすべての種類の記号、信号、文言、影像、音響又は情報の送信、発射又は受信をいう。従って、無線通信とは、テレビやラジオのような放送の受信や、衛星又はその類からの電波の受信、他の固定端末や他の移動端末との間の通信等を含む概念である。 The electronic device 1 has a wireless communication function. Note that wireless communication is communication using radio waves, and means, for example, transmission, emission, or reception of all types of symbols, signals, texts, images, sounds, or information performed using radio waves. Therefore, wireless communication is a concept including reception of broadcasting such as television and radio, reception of radio waves from satellites or the like, communication with other fixed terminals or other mobile terminals, and the like.

電子機器１は、例えば携帯型であるが、固定型であってもよい。携帯型の電子機器１は、携帯電話、ＰＤＡ(personal digital assistant)、タブレットのような携帯型情報端末、携帯ゲーム機、携帯音楽プレーヤ等であってもよい。 The electronic device 1 is, for example, a portable type, but may be a fixed type. The mobile electronic device 1 may be a mobile phone, a PDA (personal digital assistant), a mobile information terminal such as a tablet, a mobile game machine, a mobile music player, or the like.

電子機器１は、筐体１１と、ロッドアンテナ２０と、支持部材（ホルダ）４０と、ＤＴＶ（digital television）回路６０（第１無線回路部の一例）と、Ｗｉ−Ｆｉ（Wireless Fidelity）回路７０（第２無線回路部の一例）と、絶縁部材９０とを含む。 The electronic device 1 includes a housing 11, a rod antenna 20, a support member (holder) 40, a DTV (digital television) circuit 60 (an example of a first wireless circuit unit), and a Wi-Fi (Wireless Fidelity) circuit 70. It includes (an example of the second wireless circuit unit) and an insulating member 90.

筐体１１は、電子機器１の内部構成要素を収容する。筐体１１は、複数の筐体部の組み合わせにより形成されてよい。筐体１１は、例えば樹脂により形成される。電子機器１の内部構成要素は、支持部材４０や基板８０を含む。 The housing 11 houses the internal components of the electronic device 1. The housing 11 may be formed by combining a plurality of housing parts. The housing 11 is made of resin, for example. Internal components of the electronic device 1 include the support member 40 and the substrate 80.

ロッドアンテナ２０は、導電性を有し、例えば金属により形成される。ロッドアンテナ２０は、伸縮を可能とする伸縮機構を備え、アンテナ部材の一例である。具体的には、ロッドアンテナ２０は、図１Ａに示す伸長状態にあるとき、長さが最大値ｌｃ（第１長さの一例）となり、図１Ｂに示す収納状態にあるとき、長さが最小値ｌｄ（第２長さの一例）となる。ロッドアンテナ２０が備える伸縮機構は、任意であるが、一例は、図２Ａ及び図２Ｂを参照して後述する。ロッドアンテナ２０のアンテナ機能の詳細は、後述する。 The rod antenna 20 has conductivity and is made of, for example, metal. The rod antenna 20 includes an expansion / contraction mechanism that allows expansion / contraction, and is an example of an antenna member. Specifically, the rod antenna 20 has a maximum length lc (an example of the first length) when in the extended state shown in FIG. 1A, and has a minimum length when in the stored state shown in FIG. 1B. The value is ld (an example of the second length). The telescopic mechanism included in the rod antenna 20 is arbitrary, but an example will be described later with reference to FIGS. 2A and 2B. Details of the antenna function of the rod antenna 20 will be described later.

支持部材４０は、筐体１１に対してロッドアンテナ２０を支持する。支持部材４０は、例えば筐体１１に対して固定される。支持部材４０は、筐体１１に直接固定されてもよいし、筐体１１に他の部材を介して固定されてもよい。支持部材４０は、図１Ａに示すように、筐体１１の上側且つＸ方向の一方側の角部付近に設けられてよい。支持部材４０は、導電性を有し、例えば金属により形成される。支持部材４０は、後述のようにアンテナ構造の一部を形成する。支持部材４０のアンテナ機能の詳細は、後述する。 The support member 40 supports the rod antenna 20 with respect to the housing 11. The support member 40 is fixed to the housing 11, for example. The support member 40 may be directly fixed to the housing 11 or may be fixed to the housing 11 via another member. As shown in FIG. 1A, the support member 40 may be provided near the corner on the upper side of the housing 11 and on one side in the X direction. The support member 40 has conductivity and is made of, for example, metal. The support member 40 forms a part of the antenna structure as described later. Details of the antenna function of the support member 40 will be described later.

実施例では、一例として、支持部材４０は、円筒状の形態である。以下では、径方向は、支持部材４０の円筒状を基準とし、例えば「内径側」とは、径方向で支持部材４０の円筒状の中心軸に近い側である。支持部材４０は、円筒状の形態の内径側をロッドアンテナ２０が通る態様で、ロッドアンテナ２０を支持する。また、支持部材４０の外周面には、Ｘ方向に延在する電極部４２及び４４が形成される。電極部４２及び４４は、支持部材４０と一体に形成されてよい。 In the embodiment, as an example, the support member 40 has a cylindrical shape. In the following, the radial direction is based on the cylindrical shape of the support member 40, and, for example, the “inner diameter side” is the side closer to the central axis of the cylindrical shape of the support member 40 in the radial direction. The support member 40 supports the rod antenna 20 in such a manner that the rod antenna 20 passes through the inner diameter side of the cylindrical shape. Further, electrode portions 42 and 44 extending in the X direction are formed on the outer peripheral surface of the support member 40. The electrode portions 42 and 44 may be formed integrally with the support member 40.

ＤＴＶ回路６０は、図１Ａ及び図１Ｂに示すように、Ｙ方向で支持部材４０の下端側に電気的に接続される。ＤＴＶ回路６０は、ＤＴＶに係る受信信号を処理する回路であり、地上波デジタル放送用の周波数（４７０〜７２０ＭＨｚ）（第１周波数の一例）の電波に係る処理を行う無線回路である。ＤＴＶ回路６０は、基板８０上に形成される。基板８０上におけるＤＴＶ回路６０の端部（給電部）は、支持部材４０の下端側の電極部４４に、例えば金属製のバネ等を介して、電気的に接続される。 As shown in FIGS. 1A and 1B, the DTV circuit 60 is electrically connected to the lower end side of the support member 40 in the Y direction. The DTV circuit 60 is a circuit that processes a received signal relating to DTV, and is a wireless circuit that performs processing relating to radio waves having a frequency (470 to 720 MHz) for terrestrial digital broadcasting (an example of a first frequency). The DTV circuit 60 is formed on the substrate 80. The end portion (power feeding portion) of the DTV circuit 60 on the substrate 80 is electrically connected to the electrode portion 44 on the lower end side of the support member 40, for example, via a metal spring or the like.

Ｗｉ−Ｆｉ回路７０は、図１Ａ及び図１Ｂに示すように、Ｙ方向で支持部材４０の上端側に電気的に接続される。Ｗｉ−Ｆｉ回路７０は、Ｗｉ−Ｆｉに係る送信信号及び受信信号を処理する回路であり、Ｗｉ−Ｆｉ用の周波数（例えば２．４ＧＨｚや５ＧＨｚ）（第２周波数の一例）の電波に係る処理を行う無線回路である。Ｗｉ−Ｆｉ回路７０は、基板８０上に形成される。基板８０上におけるＷｉ−Ｆｉ回路７０の端部（給電部）は、支持部材４０の上端側の電極部４２に、例えば金属製のバネ等を介して、電気的に接続される。尚、図１Ａ及び図１Ｂでは、Ｗｉ−Ｆｉ回路７０及びＤＴＶ回路６０は、共通の基板８０上に形成されるが、別々の基板に形成されてもよい。 The Wi-Fi circuit 70 is electrically connected to the upper end side of the support member 40 in the Y direction, as shown in FIGS. 1A and 1B. The Wi-Fi circuit 70 is a circuit that processes a transmission signal and a reception signal related to Wi-Fi, and a process related to a radio wave having a Wi-Fi frequency (for example, 2.4 GHz or 5 GHz) (an example of a second frequency). It is a wireless circuit that performs. The Wi-Fi circuit 70 is formed on the substrate 80. The end portion (power feeding portion) of the Wi-Fi circuit 70 on the substrate 80 is electrically connected to the electrode portion 42 on the upper end side of the support member 40, for example, via a metal spring or the like. Although the Wi-Fi circuit 70 and the DTV circuit 60 are formed on the common substrate 80 in FIGS. 1A and 1B, they may be formed on different substrates.

絶縁部材９０は、電気的に絶縁性があり、例えば樹脂などで形成される。絶縁部材９０は、ロッドアンテナ２０に設けられる。絶縁部材９０は、ロッドアンテナ２０と支持部材４０との間が電気的に接続される第１状態と、ロッドアンテナ２０と支持部材４０との間が電気的に切断される第２状態とを切り替える。絶縁部材９０による第１状態と第２状態の間の切り替えは、ロッドアンテナ２０の伸縮動作に機械的に連動する。具体的には、図１Ｂに示す収納状態にあるときに、絶縁部材９０は、支持部材４０とロッドアンテナ２０との間に位置することで（図２Ｂ参照）、支持部材４０とロッドアンテナ２０との間を電気的に絶縁する（即ち第２状態を形成する）。他方、図１Ａに示す伸長状態にあるときに、絶縁部材９０は、支持部材４０とロッドアンテナ２０との間に位置することがなく（図２Ａ参照）、支持部材４０とロッドアンテナ２０との間が電気的に接続された状態（即ち第１状態）を形成する。 The insulating member 90 is electrically insulating and is made of, for example, resin. The insulating member 90 is provided on the rod antenna 20. The insulating member 90 switches between a first state in which the rod antenna 20 and the support member 40 are electrically connected and a second state in which the rod antenna 20 and the support member 40 are electrically disconnected. . The switching between the first state and the second state by the insulating member 90 is mechanically linked to the expansion and contraction operation of the rod antenna 20. Specifically, when in the housed state shown in FIG. 1B, the insulating member 90 is positioned between the support member 40 and the rod antenna 20 (see FIG. 2B), so that the support member 40 and the rod antenna 20 are separated from each other. The two are electrically insulated (that is, the second state is formed). On the other hand, when the insulating member 90 is in the extended state shown in FIG. 1A, the insulating member 90 is not located between the supporting member 40 and the rod antenna 20 (see FIG. 2A), and is between the supporting member 40 and the rod antenna 20. Form an electrically connected state (that is, a first state).

図２Ａ及び図２Ｂは、ロッドアンテナ２０の伸縮機構及び絶縁部材９０の機能の説明図であり、図２Ａは、ロッドアンテナ２０の伸長状態を示す断面図であり、図２Ｂは、ロッドアンテナ２０の格納状態を示す断面図である。 2A and 2B are explanatory views of the function of the expansion / contraction mechanism of the rod antenna 20 and the insulating member 90, FIG. 2A is a cross-sectional view showing an extended state of the rod antenna 20, and FIG. 2B is a view of the rod antenna 20. It is sectional drawing which shows a storage state.

ロッドアンテナ２０は、円筒状の支持部材４０の中心軸上に延在する。ロッドアンテナ２０は、径の異なる複数のロッド部材２１〜２４と、第１ストッパ部材２５と、第２ストッパ部材２８とを含む。ロッド部材２１〜２４、第１ストッパ部材２５、及び第２ストッパ部材２８は、互いに電気的に接続されている。ロッド部材２４の上端には、絶縁部材９０が同心状に設けられる。尚、図２Ａ及び図２Ｂでは、ロッド部材２１〜２４の数は４つであるが、ロッド部材の数は任意である。 The rod antenna 20 extends on the central axis of the cylindrical support member 40. The rod antenna 20 includes a plurality of rod members 21 to 24 having different diameters, a first stopper member 25, and a second stopper member 28. The rod members 21 to 24, the first stopper member 25, and the second stopper member 28 are electrically connected to each other. An insulating member 90 is concentrically provided on the upper end of the rod member 24. 2A and 2B, the number of rod members 21 to 24 is four, but the number of rod members is arbitrary.

ロッド部材２１は、例えば中実であり、外径は、中空のロッド部材２２の内径よりわずかに小さい。ロッド部材２２は、ロッド部材２１の外周面上を摺動する態様で、ロッド部材２１に対してＹ方向に変位できる。尚、ロッド部材２１とロッド部材２２との間には、抜け防止用のストッパ部（符号付与せず）が形成される共に、径方向に弾性力を生じるバネ（図示せず）が設けられてもよい。ロッド部材２３は、中空であり、内径は、ロッド部材２２の外径よりも僅かに大きい。ロッド部材２３は、ロッド部材２２の外周面上を摺動する態様で、ロッド部材２２に対してＹ方向に変位できる。尚、同様に、ロッド部材２３とロッド部材２２との間には、抜け防止用のストッパ部（符号付与せず）が形成される共に、径方向に弾性力を生じるバネ（図示せず）が設けられてもよい。また、ロッド部材２４は、中空であり、内径は、ロッド部材２３の外径よりも僅かに大きい。ロッド部材２４は、ロッド部材２３の外周面上を摺動する態様で、ロッド部材２３に対してＹ方向に変位できる。尚、同様に、ロッド部材２４とロッド部材２３との間には、抜け防止用のストッパ部（符号付与せず）が形成される共に、径方向に弾性力を生じるバネ（図示せず）が設けられてもよい。かかる構造によれば、径の異なる複数のロッド部材２１〜２４は、径方向で隣接するロッド部材に対して摺動しながらＹ方向に変位することで、図１Ａに示す伸長状態と図１Ｂに示す収納状態との間で伸縮が可能である。また、ロッド部材２４は、外径が支持部材４０の内径よりも僅かに小さい。例えば、ロッド部材２４は、第２ストッパ部材２８と同じ外径を有する。従って、ロッド部材２４は、支持部材４０の内径側でＹ方向に変位できる。 The rod member 21 is, for example, solid, and its outer diameter is slightly smaller than the inner diameter of the hollow rod member 22. The rod member 22 can be displaced in the Y direction with respect to the rod member 21 in a manner of sliding on the outer peripheral surface of the rod member 21. Between the rod member 21 and the rod member 22, a stopper portion (not provided with a reference numeral) for preventing slippage is formed, and a spring (not shown) for generating elastic force in the radial direction is provided. Good. The rod member 23 is hollow and its inner diameter is slightly larger than the outer diameter of the rod member 22. The rod member 23 can be displaced in the Y direction with respect to the rod member 22 in a manner of sliding on the outer peripheral surface of the rod member 22. Similarly, between the rod member 23 and the rod member 22, a stopper portion (not given a reference numeral) for preventing slippage is formed, and a spring (not shown) for generating elastic force in the radial direction is formed. It may be provided. The rod member 24 is hollow, and the inner diameter thereof is slightly larger than the outer diameter of the rod member 23. The rod member 24 can be displaced in the Y direction with respect to the rod member 23 in a manner of sliding on the outer peripheral surface of the rod member 23. Similarly, between the rod member 24 and the rod member 23, a stopper portion (not given a reference numeral) for preventing slippage is formed, and a spring (not shown) for generating elastic force in the radial direction is formed. It may be provided. According to this structure, the plurality of rod members 21 to 24 having different diameters are displaced in the Y direction while sliding relative to the adjacent rod members in the radial direction, so that the expanded state shown in FIG. It is possible to expand and contract with the storage state shown. The outer diameter of the rod member 24 is slightly smaller than the inner diameter of the support member 40. For example, the rod member 24 has the same outer diameter as the second stopper member 28. Therefore, the rod member 24 can be displaced in the Y direction on the inner diameter side of the support member 40.

第１ストッパ部材２５は、ロッド部材２２の下端部を回転可能に支持する。第１ストッパ部材２５は、中空であり、外径は、中空の第２ストッパ部材２８の内径よりわずかに小さい。第１ストッパ部材２５は、第２ストッパ部材２８の内周面上を摺動する態様で、第２ストッパ部材２８に対してＹ方向に変位できる。第１ストッパ部材２５と第２ストッパ部材２８との間には、抜け防止用のストッパ部（符号付与せず）が形成される共に、径方向に弾性力を生じるバネ（図示せず）が設けられてもよい。 The first stopper member 25 rotatably supports the lower end portion of the rod member 22. The first stopper member 25 is hollow, and the outer diameter thereof is slightly smaller than the inner diameter of the hollow second stopper member 28. The first stopper member 25 can be displaced in the Y direction with respect to the second stopper member 28 in a manner of sliding on the inner peripheral surface of the second stopper member 28. Between the first stopper member 25 and the second stopper member 28, a stopper portion (not given a reference numeral) for preventing slippage is formed, and a spring (not shown) for generating elastic force in the radial direction is provided. You may be asked.

第２ストッパ部材２８は、後述のストッパ部２８１が設けられる部位を除いて、支持部材４０の内径よりも僅かに小さい外径を有する。第２ストッパ部材２８は、支持部材４０の内径側でＹ方向に変位できる。第２ストッパ部材２８の下端部には、支持部材４０の内径よりも径方向外側に突出するストッパ部２８１が形成される。第２ストッパ部材２８は、ストッパ部２８１が支持部材４０にＹ方向に当接することで（図２Ａ参照）、支持部材４０からのＹ１方向への抜けが防止される。また、第２ストッパ部材２８は、ロッド部材２４の外径と同じ外径を有し、ロッド部材２４が下方に変位するとき、ロッド部材２４の下端面にＹ方向で当接する（図２Ｂ参照）。ロッド部材２４は、第２ストッパ部材２８に下端が当接すると、第２ストッパ部材２８と一体となって下方に変位できる。但し、このような下方への変位は、絶縁部材９０が支持部材４０にＹ方向に当接したときに係止される（図２Ｂ参照）。即ち、絶縁部材９０は、上端部９２の外径が支持部材４０の内径よりも僅かに大きく、従って、絶縁部材９０の上端部９２が支持部材４０にＹ方向に当接したときが、ロッドアンテナ２０の下方への変位の終端となる。 The second stopper member 28 has an outer diameter slightly smaller than the inner diameter of the support member 40, except for a portion where a stopper portion 281 described later is provided. The second stopper member 28 can be displaced in the Y direction on the inner diameter side of the support member 40. At the lower end of the second stopper member 28, a stopper portion 281 that projects radially outward from the inner diameter of the support member 40 is formed. The second stopper member 28 is prevented from coming off from the support member 40 in the Y1 direction by the stopper portion 281 contacting the support member 40 in the Y direction (see FIG. 2A). Further, the second stopper member 28 has the same outer diameter as the outer diameter of the rod member 24, and contacts the lower end surface of the rod member 24 in the Y direction when the rod member 24 is displaced downward (see FIG. 2B). . When the lower end of the rod member 24 contacts the second stopper member 28, the rod member 24 can be displaced downward together with the second stopper member 28. However, such downward displacement is locked when the insulating member 90 contacts the supporting member 40 in the Y direction (see FIG. 2B). That is, in the insulating member 90, the outer diameter of the upper end portion 92 is slightly larger than the inner diameter of the support member 40. Therefore, when the upper end portion 92 of the insulating member 90 contacts the support member 40 in the Y direction, the rod antenna. This is the end of the downward displacement of 20.

絶縁部材９０は、中実の円柱状の部材又は中空の円筒状の部材であり、上端部９２と、本体部９４とを含む。本体部９４の外径は、支持部材４０の内径よりも僅かに小さい。従って、本体部９４は、支持部材４０の内径側でＹ方向に変位できる。本体部９４の下端は、ロッド部材２４の上端に、嵌合等により結合される。本体部９４のＹ方向の長さは、支持部材４０のＹ方向の長さよりも僅かに長い。従って、ロッドアンテナ２０の格納状態においては、図２Ｂに示すように、支持部材４０の内径側には、ロッドアンテナ２０が存在せず、支持部材４０とロッドアンテナ２０との間が電気的に絶縁される。 The insulating member 90 is a solid cylindrical member or a hollow cylindrical member, and includes an upper end portion 92 and a main body portion 94. The outer diameter of the main body portion 94 is slightly smaller than the inner diameter of the support member 40. Therefore, the main body 94 can be displaced in the Y direction on the inner diameter side of the support member 40. The lower end of the main body 94 is joined to the upper end of the rod member 24 by fitting or the like. The length of the main body portion 94 in the Y direction is slightly longer than the length of the support member 40 in the Y direction. Therefore, in the retracted state of the rod antenna 20, as shown in FIG. 2B, the rod antenna 20 does not exist on the inner diameter side of the support member 40, and the support member 40 and the rod antenna 20 are electrically insulated from each other. To be done.

図２Ａ及び図２Ｂに示すロッドアンテナ２０の伸縮機構及び絶縁部材９０によれば、図２Ａに示すように、ロッドアンテナ２０の伸長状態においては、ロッドアンテナ２０は、第２ストッパ部材２８が支持部材４０に接触する。これにより、ロッドアンテナ２０が支持部材４０に電気的に接続された第１状態を形成できる。 According to the expansion / contraction mechanism of the rod antenna 20 and the insulating member 90 shown in FIGS. 2A and 2B, as shown in FIG. 2A, when the rod antenna 20 is in the extended state, the rod antenna 20 has the second stopper member 28 as a supporting member. Contact 40. Thereby, the first state in which the rod antenna 20 is electrically connected to the support member 40 can be formed.

また、図２Ａ及び図２Ｂに示すロッドアンテナ２０の伸縮機構及び絶縁部材９０によれば、図２Ｂに示すように、ロッドアンテナ２０の収容状態においては、ロッドアンテナ２０は、絶縁部材９０に起因して支持部材４０に接触することはない。これにより、ロッドアンテナ２０が支持部材４０から電気的に切断された第２状態を形成できる。 Further, according to the expansion / contraction mechanism of the rod antenna 20 and the insulating member 90 shown in FIGS. 2A and 2B, the rod antenna 20 is caused by the insulating member 90 in the housed state of the rod antenna 20 as shown in FIG. 2B. Does not come into contact with the support member 40. Accordingly, the rod antenna 20 can be formed into the second state in which the rod antenna 20 is electrically disconnected from the support member 40.

図３は、ＤＴＶ回路６０を含むＤＴＶ放送受信部６００の一例を示すブロック図である。ＤＴＶ放送受信部６００は、電子機器１において実現される。 FIG. 3 is a block diagram showing an example of a DTV broadcast receiving unit 600 including the DTV circuit 60. The DTV broadcast receiving unit 600 is realized in the electronic device 1.

ＤＴＶ放送受信部６００は、ＤＴＶ回路６０と、ＤＴＶ放送受信アンテナ６０２とを含む。 The DTV broadcast receiving unit 600 includes a DTV circuit 60 and a DTV broadcast receiving antenna 602.

ＤＴＶ回路６０は、地上波デジタル放送用の周波数（例えば４７０ＭＨｚ等）の電波に係る受信信号を処理し、地上波デジタル放送の受信を実現する回路である。ＤＴＶ回路６０は、整合回路６１と、ＳＡＷ（Surface Acoustic Wave）フィルタ６２と、ＬＮＡ（Low Noise Amplifier）６３と、フィルタ６４と、ＲＦ（Radio Frequency）・ＩＣ（Integrated Circuit）６５とを含む。ＤＴＶ回路６０の各要素の機能は、広く知られており、詳細な説明を省略する。 The DTV circuit 60 is a circuit that processes a reception signal related to a radio wave of a frequency for terrestrial digital broadcasting (for example, 470 MHz) and realizes reception of terrestrial digital broadcasting. The DTV circuit 60 includes a matching circuit 61, a SAW (Surface Acoustic Wave) filter 62, an LNA (Low Noise Amplifier) 63, a filter 64, and an RF (Radio Frequency) / IC (Integrated Circuit) 65. The function of each element of the DTV circuit 60 is widely known, and detailed description thereof will be omitted.

ＤＴＶ放送受信アンテナ６０２は、地上波デジタル放送用の周波数（４７０〜７２０ＭＨｚ）の電波を受信する。ＤＴＶ放送受信アンテナ６０２は、地上波デジタル放送用の周波数で共振が生じるように形成される。実施例では、ＤＴＶ放送受信アンテナ６０２は、図１Ａに示す伸長状態にあるロッドアンテナ２０及び支持部材４０の組み合わせにより実現される。地上波デジタル放送用の周波数（例えば４７０ＭＨｚ等）に対応する波長をλａとすると、図１Ａに示す伸長状態のロッドアンテナ２０及び支持部材４０により形成されるＹ方向の長さｌａ（＝ｌｃ＋ｌｂ）は、λａ／８≦ｌａ≦３λａ／８の関係を満たす。例えば、ＤＴＶ放送受信部６００におけるロッドアンテナ２０や、支持部材４０、給電点等を含む電気長は、約λａ／４になるように調整される。これにより、図１Ａに示す伸長状態においては、ＤＴＶ回路６０は、ロッドアンテナ２０及び支持部材４０をモノポールアンテナとして、地上波デジタル放送用の周波数の電波を受信できる。従って、図１Ａに示す伸長状態においては、ユーザは、地上波デジタル放送を電子機器１上で視聴できる。 The DTV broadcast receiving antenna 602 receives a radio wave having a frequency (470 to 720 MHz) for digital terrestrial broadcasting. The DTV broadcast receiving antenna 602 is formed so that resonance occurs at a frequency for digital terrestrial broadcasting. In the embodiment, the DTV broadcast receiving antenna 602 is realized by the combination of the rod antenna 20 and the support member 40 in the extended state shown in FIG. 1A. Assuming that the wavelength corresponding to the frequency for terrestrial digital broadcasting (eg, 470 MHz) is λa, the length la (= lc + lb) in the Y direction formed by the rod antenna 20 and the support member 40 in the extended state shown in FIG. 1A is , Λa / 8 ≦ la ≦ 3λa / 8 is satisfied. For example, the electrical length of the DTV broadcast receiving unit 600 including the rod antenna 20, the support member 40, the feeding point, etc. is adjusted to be about λa / 4. As a result, in the expanded state shown in FIG. 1A, the DTV circuit 60 can receive radio waves having a frequency for digital terrestrial broadcasting by using the rod antenna 20 and the support member 40 as a monopole antenna. Therefore, in the expanded state shown in FIG. 1A, the user can view the terrestrial digital broadcast on the electronic device 1.

図４は、Ｗｉ−Ｆｉ回路７０を含むＷｉ−Ｆｉ通信部７００の一例を示すブロック図である。Ｗｉ−Ｆｉ通信部７００は、電子機器１において実現される。 FIG. 4 is a block diagram showing an example of the Wi-Fi communication unit 700 including the Wi-Fi circuit 70. The Wi-Fi communication unit 700 is realized in the electronic device 1.

Ｗｉ−Ｆｉ通信部７００は、Ｗｉ−Ｆｉ回路７０と、Ｗｉ−Ｆｉ用アンテナ７０２とを含む。 The Wi-Fi communication unit 700 includes a Wi-Fi circuit 70 and a Wi-Fi antenna 702.

Ｗｉ−Ｆｉ回路７０は、Ｗｉ−Ｆｉ用の周波数（例えば５ＧＨｚ）の電波に係る送受信信号を処理し、Ｗｉ−Ｆｉによる無線通信を実現する回路である。Ｗｉ−Ｆｉ回路７０は、整合回路７１と、カップラ７３と、ＳＡＷフィルタ７４と、ＲＦ・ＩＣ７５とを含む。Ｗｉ−Ｆｉ回路７０の各要素の機能は、広く知られており、詳細な説明を省略する。尚、カップラ７３は、送信（ＴＸ）動作のフィードバック用にＲＦ・ＩＣ７５に接続されている。 The Wi-Fi circuit 70 is a circuit that processes a transmission / reception signal related to a radio wave of a Wi-Fi frequency (for example, 5 GHz) and realizes wireless communication by Wi-Fi. The Wi-Fi circuit 70 includes a matching circuit 71, a coupler 73, a SAW filter 74, and an RF / IC 75. The function of each element of the Wi-Fi circuit 70 is widely known, and detailed description thereof will be omitted. The coupler 73 is connected to the RF / IC 75 for feedback of the transmission (TX) operation.

Ｗｉ−Ｆｉ用アンテナ７０２は、Ｗｉ−Ｆｉ用の周波数の電波を送受信する。Ｗｉ−Ｆｉ用アンテナ７０２は、Ｗｉ−Ｆｉ用の周波数で共振が生じるように形成される。実施例では、Ｗｉ−Ｆｉ用アンテナ７０２は、図１Ａに示す伸長状態及び図１Ｂに示す収容状態のいずれにおいても、支持部材４０により実現される。Ｗｉ−Ｆｉ用の周波数（例えば５ＧＨｚ）に対応する波長をλｂとすると、支持部材４０のＹ方向の長さｌｂは、λｂ／８≦ｌｂ≦３λｂ／８の関係を満たす。例えば、Ｗｉ−Ｆｉ通信部７００における支持部材４０や給電点等を含む電気長は、約λｂ／４になるように調整される。これにより、図１Ａに示す伸長状態及び図１Ｂに示す収容状態のいずれにおいても、Ｗｉ−Ｆｉ回路７０は、支持部材４０をモノポールアンテナとして、Ｗｉ−Ｆｉ用の周波数の電波を送受信できる。従って、図１Ａに示す伸長状態及び図１Ｂに示す収容状態のいずれにおいても、ユーザは、電子機器１でＷｉ−Ｆｉによる無線通信を実現できる。 The Wi-Fi antenna 702 transmits and receives radio waves having a Wi-Fi frequency. The Wi-Fi antenna 702 is formed so that resonance occurs at a Wi-Fi frequency. In the embodiment, the Wi-Fi antenna 702 is realized by the support member 40 in both the extended state shown in FIG. 1A and the housed state shown in FIG. 1B. When the wavelength corresponding to the Wi-Fi frequency (for example, 5 GHz) is λb, the length lb of the support member 40 in the Y direction satisfies the relationship of λb / 8 ≦ lb ≦ 3λb / 8. For example, the electrical length of the Wi-Fi communication unit 700 including the support member 40 and the feeding point is adjusted to be about λb / 4. As a result, in both the extended state shown in FIG. 1A and the housed state shown in FIG. 1B, the Wi-Fi circuit 70 can transmit and receive a radio wave having a Wi-Fi frequency using the supporting member 40 as a monopole antenna. Therefore, in both the extended state shown in FIG. 1A and the housed state shown in FIG. 1B, the user can realize wireless communication by Wi-Fi with the electronic device 1.

図５は、図１Ａに示す伸長状態におけるアンテナ動作原理の説明図であり、図６は、図１Ｂに示す収容状態におけるアンテナ動作原理の説明図である。図５には、地上波デジタル放送用の周波数に対応するモノポールアンテナの範囲がＷ１で模式的に示されている。また、図５には、Ｗｉ−Ｆｉ用の周波数に対応するモノポールアンテナの範囲がＷ２で模式的に示されている。 FIG. 5 is an explanatory diagram of the antenna operating principle in the extended state shown in FIG. 1A, and FIG. 6 is an explanatory diagram of the antenna operating principle in the housed state shown in FIG. 1B. In FIG. 5, the range of the monopole antenna corresponding to the frequency for digital terrestrial broadcasting is schematically shown by W1. Further, in FIG. 5, the range of the monopole antenna corresponding to the frequency for Wi-Fi is schematically shown by W2.

ロッドアンテナ２０の伸長状態では、図５に模式的に示すように、ロッドアンテナ２０及び支持部材４０は、地上波デジタル放送用のモノポールアンテナとして機能できる。また、ロッドアンテナ２０の伸長状態では、図５に模式的に示すように、支持部材４０は、Ｗｉ−Ｆｉ用のモノポールアンテナとして機能できる。尚、Ｗｉ−Ｆｉ回路７０からの送信電力は、支持部材４０を介してロッドアンテナ２０にも供給されうるが、ロッドアンテナ２０及び支持部材４０により形成される導体部においては、Ｗｉ−Ｆｉ用の周波数との関係で共振が生じない。このようにして、ロッドアンテナ２０の伸長状態では、地上波デジタル放送用の周波数とＷｉ−Ｆｉ用の周波数の２周波であって、互いに有意に異なる２周波に同時に対応できる。 In the extended state of the rod antenna 20, as schematically shown in FIG. 5, the rod antenna 20 and the support member 40 can function as a monopole antenna for terrestrial digital broadcasting. Further, in the extended state of the rod antenna 20, as schematically shown in FIG. 5, the support member 40 can function as a monopole antenna for Wi-Fi. The transmission power from the Wi-Fi circuit 70 may be supplied to the rod antenna 20 via the supporting member 40, but the conductor portion formed by the rod antenna 20 and the supporting member 40 is for Wi-Fi. Resonance does not occur in relation to frequency. In this way, when the rod antenna 20 is in the expanded state, it is possible to simultaneously support two frequencies, which are the frequency for digital terrestrial broadcasting and the frequency for Wi-Fi, and which are significantly different from each other.

ロッドアンテナ２０の収容状態では、図６に模式的に示すように、支持部材４０は、Ｗｉ−Ｆｉ用のモノポールアンテナとして機能できる。ロッドアンテナ２０の収容状態では、上述のように、ロッドアンテナ２０と支持部材４０は、絶縁部材９０により電気的に絶縁される。従って、支持部材４０は、ロッドアンテナ２０の伸長状態と同様に、Ｗｉ−Ｆｉ用のモノポールアンテナとして機能できる。尚、支持部材４０には、ＤＴＶ回路６０が電気的に接続されているが、支持部材４０により形成される導体部においては、地上波デジタル放送用の周波数との関係では共振が生じない。即ち、支持部材４０により形成される導体部においては、Ｗｉ−Ｆｉ用の周波数との関係でしか共振が生じない。このようにして、ロッドアンテナ２０の収容状態では、Ｗｉ−Ｆｉ用の周波数の１周波に対応できる。 In the housed state of the rod antenna 20, as schematically shown in FIG. 6, the support member 40 can function as a monopole antenna for Wi-Fi. In the housed state of the rod antenna 20, the rod antenna 20 and the support member 40 are electrically insulated by the insulating member 90 as described above. Therefore, the support member 40 can function as a monopole antenna for Wi-Fi, similarly to the extended state of the rod antenna 20. Although the DTV circuit 60 is electrically connected to the supporting member 40, resonance does not occur in the conductor portion formed by the supporting member 40 in relation to the frequency for digital terrestrial broadcasting. That is, in the conductor portion formed by the support member 40, resonance occurs only in relation to the Wi-Fi frequency. In this way, when the rod antenna 20 is accommodated, one frequency of Wi-Fi can be handled.

尚、ロッドアンテナ２０の収容状態では、ロッドアンテナ２０のＹ方向の長さｌｄは、支持部材４０のＹ方向の長さｌｂよりも有意に（例えば２倍以上）長い。ここで、収容状態におけるロッドアンテナ２０のＹ方向の長さｌｄを長さｌｂと同程度にできるのであれば、絶縁部材９０を省略できる。しかしながら、収容状態におけるロッドアンテナ２０のＹ方向の長さｌｄを長さｌｂと同程度にすることは、ロッドアンテナ２０のロッド部材数の増加及びそれに伴いロッドアンテナ２０の径の大型化を招くため、実質的に困難である。換言すると、本実施例によれば、収容状態におけるロッドアンテナ２０のＹ方向の長さｌｄを長さｌｂを同程度にできないほど大きな差のある２周波に対応できる。 In the housed state of the rod antenna 20, the length ld of the rod antenna 20 in the Y direction is significantly (for example, twice or more) longer than the length lb of the support member 40 in the Y direction. Here, if the length ld of the rod antenna 20 in the housed state in the Y direction can be made substantially equal to the length lb, the insulating member 90 can be omitted. However, setting the length ld of the rod antenna 20 in the housed state in the Y direction to the same extent as the length lb causes an increase in the number of rod members of the rod antenna 20 and a corresponding increase in the diameter of the rod antenna 20. , Practically difficult. In other words, according to the present embodiment, it is possible to cope with two frequencies having a large difference in which the length ld in the Y direction of the rod antenna 20 in the housed state cannot be made equal to the length lb.

ところで、近年、通信システムの増加や対応周波数の増加、及び無線通信端末のような電子機器１の小型化に伴い、アンテナの小型化及び共用化の必要性が高くなってきている。特に、筐体内に伸縮可能な地上波デジタル放送用のロッドアンテナを装備した電子機器１については、ロッドアンテナの収納のために比較的大きなスペースを確保する必要があるため、他のアンテナ用の実装スペースを確保することが非常に困難であった。 By the way, in recent years, with the increase of communication systems, the increase of compatible frequencies, and the downsizing of electronic devices 1 such as wireless communication terminals, there is an increasing need for downsizing and sharing of antennas. In particular, for the electronic device 1 equipped with a retractable terrestrial digital broadcasting rod antenna in the housing, it is necessary to secure a relatively large space for accommodating the rod antenna. It was very difficult to secure space.

特に、無線通信端末では、セルラー帯として、700MHz、800MHz、1.5GHz、1.7GHz、2GHz、2.6GHzが搭載されており、更に対応周波数が増加する予定がある。一方、セルラー帯域以外にも、GPS(1.5GHz)やWi-Fi（2.4GHz、5GHz）は、MIMO（Multi-Input Multi-Output）用として2系統必要となりえる。更には、FeliCa（登録商標）アンテナや、TransferJet（登録商標）用アンテナなど様々な無線通信システムに対応したアンテナを搭載する必要が生じうる。これらの全てのアンテナを個別に設計してしまうと、無線通信端末の筐体内部に入りきらないため、これらのアンテナの一部を共用化することが有用となる。この点、同一または周波数が近しい無線通信システム間は比較的容易に共用化ができる（例えば、セルラーサブアンテナの1.5GHz帯とGPSや、Wi-FiとBluetooth（登録商標）など）が、有意に異なる周波数間では共用化が困難であった。例えば、地上波デジタル放送用のロッドアンテナ２０は、他の無線通信システムと周波数が大きく異なるため、共用化が大きな課題となっていた。 In particular, wireless communication terminals are equipped with 700 MHz, 800 MHz, 1.5 GHz, 1.7 GHz, 2 GHz, and 2.6 GHz as cellular bands, and there is a plan to further increase the compatible frequencies. On the other hand, in addition to the cellular band, GPS (1.5 GHz) and Wi-Fi (2.4 GHz, 5 GHz) may require two systems for MIMO (Multi-Input Multi-Output). Further, it may be necessary to mount an antenna compatible with various wireless communication systems such as a FeliCa (registered trademark) antenna and a TransferJet (registered trademark) antenna. If all these antennas are individually designed, they will not fit inside the housing of the wireless communication terminal, so it will be useful to share some of these antennas. In this regard, wireless communication systems that are the same or have similar frequencies can be shared relatively easily (for example, 1.5 GHz band of cellular sub-antenna and GPS, Wi-Fi and Bluetooth (registered trademark), etc.) It was difficult to share between different frequencies. For example, since the rod antenna 20 for digital terrestrial broadcasting has a frequency greatly different from that of other wireless communication systems, the sharing of the rod antenna 20 has been a big problem.

この点、本実施例によれば、地上波デジタル放送用のロッドアンテナ２０の構造を、Ｗｉ−Ｆｉ用アンテナとして機能させることができる。即ち、共用化の難しい地上波デジタル放送用のロッドアンテナ２０に対して、Ｗｉ−Ｆｉとの共用化を実現できる。これにより、Ｗｉ−Ｆｉ用アンテナをロッドアンテナ２０から独立した位置に設ける場合に比べて、筐体１１内部のアンテナ実装スペースを有効に活用できる。尚、本実施例では、他の無線通信システムの一例として、Ｗｉ−Ｆｉが用いられているが、GPSなどのＷｉ−Ｆｉ以外の無線通信システムが実現されてもよい。 In this respect, according to the present embodiment, the structure of the rod antenna 20 for digital terrestrial broadcasting can be made to function as an antenna for Wi-Fi. That is, the rod antenna 20 for terrestrial digital broadcasting, which is difficult to share, can be shared with Wi-Fi. As a result, the antenna mounting space inside the housing 11 can be effectively utilized as compared with the case where the Wi-Fi antenna is provided at a position independent of the rod antenna 20. Although Wi-Fi is used as an example of another wireless communication system in the present embodiment, a wireless communication system other than Wi-Fi such as GPS may be realized.

また、本実施例によれば、上述のように、ＤＴＶ回路６０とＷｉ−Ｆｉ回路７０がそれぞれの給電部を有するので、ＤＴＶ回路６０とＷｉ−Ｆｉ回路７０とが共通の給電部を有する場合に必要となる要素（ダイプレクサ等）を不要とすることができる。また、ＤＴＶ回路６０とＷｉ−Ｆｉ回路７０とが共通の給電部を有する構成では、有意に異なる周波数を扱う共通の整合回路を設ける必要があり、かかる整合回路を成立させることが困難となる。これに対して、本実施例によれば、個別の整合回路６１及び整合回路７１を設けることができる。 Further, according to the present embodiment, as described above, since the DTV circuit 60 and the Wi-Fi circuit 70 have their respective power feeding units, the DTV circuit 60 and the Wi-Fi circuit 70 have a common power feeding unit. It is possible to eliminate the elements (diplexer, etc.) required for the above. Further, in a configuration in which the DTV circuit 60 and the Wi-Fi circuit 70 have a common power supply section, it is necessary to provide a common matching circuit that handles frequencies that are significantly different, and it is difficult to establish such a matching circuit. On the other hand, according to this embodiment, the matching circuits 61 and 71 can be provided individually.

次に、実施例によるアンテナ特性のシュミレーション結果について説明する。 Next, the simulation result of the antenna characteristics according to the embodiment will be described.

図７は、ロッドアンテナ２０の伸長状態における地上波デジタル放送に係るアンテナ特性の説明図である。図７には、横軸に周波数を取り、縦軸に電圧定在波比(VSWR：Voltage Standing Wave Ratio)を取り、周波数に応じた電圧定在波比の特性が示される。図７に示すように、電圧定在波比は、地上波デジタル放送用の周波数帯、例えばＡ点（４７０ＭＨｚ）及びＢ点（７２０ＭＨｚ）において十分低く、良好なアンテナ特性が確認できる。 FIG. 7 is an explanatory diagram of antenna characteristics related to terrestrial digital broadcasting in the extended state of the rod antenna 20. In FIG. 7, the frequency is plotted on the horizontal axis and the voltage standing wave ratio (VSWR) is plotted on the vertical axis, showing the characteristics of the voltage standing wave ratio according to the frequency. As shown in FIG. 7, the voltage standing wave ratio is sufficiently low in the frequency band for digital terrestrial broadcasting, for example, at points A (470 MHz) and B (720 MHz), and good antenna characteristics can be confirmed.

図８は、ロッドアンテナ２０の伸長状態におけるＷｉ−Ｆｉに係るアンテナ特性の説明図である。図８には、横軸に周波数を取り、縦軸に電圧定在波比を取り、周波数に応じた電圧定在波比の特性が示される。図８に示すように、電圧定在波比は、Ｗｉ−Ｆｉ用の周波数、例えばＣ点（２．４ＧＨｚ）において十分低く、良好なアンテナ特性が確認できる。 FIG. 8 is an explanatory diagram of antenna characteristics related to Wi-Fi in the extended state of the rod antenna 20. In FIG. 8, the horizontal axis represents frequency and the vertical axis represents voltage standing wave ratio, and the characteristics of the voltage standing wave ratio according to frequency are shown. As shown in FIG. 8, the voltage standing wave ratio is sufficiently low at the Wi-Fi frequency, for example, at point C (2.4 GHz), and good antenna characteristics can be confirmed.

図９は、ロッドアンテナ２０の収容状態におけるＷｉ−Ｆｉに係るアンテナ特性の説明図である。図９には、横軸に周波数を取り、縦軸に電圧定在波比を取り、周波数に応じた電圧定在波比の特性が示される。図９に示すように、ロッドアンテナ２０の収容状態においても、電圧定在波比は、Ｗｉ−Ｆｉ用の周波数、例えばＣ点（２．４ＧＨｚ）において十分低く、良好なアンテナ特性が確認できる。 FIG. 9 is an explanatory diagram of antenna characteristics related to Wi-Fi in the accommodated state of the rod antenna 20. In FIG. 9, the horizontal axis represents frequency and the vertical axis represents voltage standing wave ratio, and the characteristics of the voltage standing wave ratio according to frequency are shown. As shown in FIG. 9, even when the rod antenna 20 is housed, the voltage standing wave ratio is sufficiently low at the frequency for Wi-Fi, for example, point C (2.4 GHz), and good antenna characteristics can be confirmed.

図１０及び図１１は、ロッドアンテナ２０の伸長状態におけるＤＴＶ回路６０とＷｉ−Ｆｉ回路７０との間のアイソレーションの説明図である。図１０には、横軸に周波数を取り、縦軸に減衰量を取り、周波数に応じた減衰量の特性が示される。尚、減衰量は、Ｗｉ−Ｆｉ回路７０の送信電力がＤＴＶ回路６０に入り込む際の減衰量であり、ここでは、Ｗｉ−Ｆｉ回路７０の送信電力に対する、ＤＴＶ回路６０に入り込む電力の電力比（dB）で示す。尚、該電力比が低いほど、減衰が大きく、アイソレーションが良好であることを意味する。図１１は、Ｗｉ−Ｆｉ回路７０の送信電力の減衰態様を模式的に示す図である。図１１には、Ｗｉ−Ｆｉ回路７０の送信電力の流れが矢印Ｒ１，Ｒ２，Ｒ４で模式的に示されると共に、同送信電力の放射Ｒ３が模式的に示される。矢印Ｒ１，Ｒ２，Ｒ４は、太さが電力の大きさを模式的に表し（太い方が電力が大きい）、点線は微小な電力であることを表す。 10 and 11 are explanatory diagrams of isolation between the DTV circuit 60 and the Wi-Fi circuit 70 in the extended state of the rod antenna 20. In FIG. 10, the frequency is plotted on the horizontal axis and the attenuation is plotted on the vertical axis, and the characteristics of the attenuation depending on the frequency are shown. The amount of attenuation is the amount of attenuation when the transmission power of the Wi-Fi circuit 70 enters the DTV circuit 60, and here, the power ratio of the power that enters the DTV circuit 60 to the transmission power of the Wi-Fi circuit 70 ( dB). It should be noted that the lower the power ratio, the greater the attenuation and the better the isolation. FIG. 11 is a diagram schematically showing how the transmission power of the Wi-Fi circuit 70 is attenuated. In FIG. 11, the flow of the transmission power of the Wi-Fi circuit 70 is schematically shown by arrows R1, R2, and R4, and the radiation R3 of the same transmission power is also schematically shown. The arrows R1, R2, and R4 schematically indicate the magnitude of power (thicker is greater power), and the dotted line represents minute power.

ところで、ロッドアンテナ２０の伸長状態においては、上述のように、支持部材４０にはＤＴＶ回路６０及びＷｉ−Ｆｉ回路７０が共に電気的に接続されるので、ＤＴＶ回路６０とＷｉ−Ｆｉ回路７０との間のアイソレーションが問題となり得る。尚、ロッドアンテナ２０の伸長状態において、ＤＴＶ回路６０は、受信のみであるが、Ｗｉ−Ｆｉ回路７０は、送信を行うため、Ｗｉ−Ｆｉ回路７０からの送信信号に係るアイソレーションが問題となり得る。 By the way, in the extended state of the rod antenna 20, as described above, the DTV circuit 60 and the Wi-Fi circuit 70 are both electrically connected to the support member 40, so that the DTV circuit 60 and the Wi-Fi circuit 70 are connected to each other. Isolation between can be a problem. It should be noted that in the extended state of the rod antenna 20, the DTV circuit 60 is only for receiving, but the Wi-Fi circuit 70 is for transmitting. Therefore, isolation related to the transmission signal from the Wi-Fi circuit 70 may be a problem. .

この点、本実施例によれば、Ｗｉ−Ｆｉ回路７０は、基板８０上でＤＴＶ回路６０と電気的に接続されているのではなく、支持部材４０を介してＤＴＶ回路６０と電気的に接続されている。従って、図１１に模式的に示すように、Ｗｉ−Ｆｉ回路７０の送信電力は、支持部材４０においてほとんどが外部に放射される。従って、ＤＴＶ回路６０に入り込む電力（矢印Ｒ４参照）は、支持部材４０での放射に起因して微小となる（即ち、支持部材４０での減衰量が大きく微小となる）。従って、本実施例によれば、ロッドアンテナ２０の伸長状態におけるＤＴＶ回路６０とＷｉ−Ｆｉ回路７０との間のアイソレーションについても良好となる。具体的には、図１０に示すように、減衰量は、地上波デジタル放送用の周波数帯、例えばＡ点（４７０ＭＨｚ）及びＢ点（７２０ＭＨｚ）において十分低く（例えば−１５ｄＢ以下であり）、良好なアイソレーションが確認できる。従って、本実施例では、ＤＴＶ回路６０のフィルタ機能を無くすことや、又は減衰量が低い比較的安価なフィルタを用いることがが可能となり得る。 In this regard, according to the present embodiment, the Wi-Fi circuit 70 is not electrically connected to the DTV circuit 60 on the substrate 80, but is electrically connected to the DTV circuit 60 via the support member 40. Has been done. Therefore, as schematically shown in FIG. 11, most of the transmission power of the Wi-Fi circuit 70 is radiated to the outside in the support member 40. Therefore, the electric power entering the DTV circuit 60 (see the arrow R4) becomes minute due to the radiation at the supporting member 40 (that is, the amount of attenuation at the supporting member 40 becomes large and minute). Therefore, according to the present embodiment, the isolation between the DTV circuit 60 and the Wi-Fi circuit 70 in the extended state of the rod antenna 20 is also good. Specifically, as shown in FIG. 10, the amount of attenuation is sufficiently low (for example, −15 dB or less) at a frequency band for terrestrial digital broadcasting, for example, point A (470 MHz) and point B (720 MHz), and is good. You can check the isolation. Therefore, in this embodiment, it may be possible to eliminate the filter function of the DTV circuit 60, or to use a relatively inexpensive filter with low attenuation.

以上、各実施例について詳述したが、特定の実施例に限定されるものではなく、特許請求の範囲に記載された範囲内において、種々の変形及び変更が可能である。また、前述した実施例の構成要素を全部又は複数を組み合わせることも可能である。 Although the respective embodiments have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the claims. Further, it is possible to combine all or a plurality of the constituent elements of the above-described embodiments.

例えば、上述した実施例では、支持部材４０に対しては２つの無線回路部（ＤＴＶ回路６０及びＷｉ−Ｆｉ回路７０）が電気的に接続されているが、これに限られない。例えば、支持部材４０に対しては３つ以上の無線回路部が電気的に接続されることで、３周波以上に対応することとしてもよい。例えば、支持部材４０の全長を長くし、ＧＰＳ用の無線回路部（受信回路部）を支持部材４０の上端に電気的に接続し、支持部材４０の下端から上方に長さｌｂの位置に、Ｗｉ−Ｆｉ回路７０を電気的に接続してもよい。この場合、支持部材４０の下端にＤＴＶ回路６０を電気的に接続することで、３周波に対応できる。 For example, in the above-described embodiment, the two wireless circuit units (DTV circuit 60 and Wi-Fi circuit 70) are electrically connected to the support member 40, but the present invention is not limited to this. For example, three or more wireless circuit units may be electrically connected to the support member 40 to support three or more frequencies. For example, the entire length of the support member 40 is lengthened, the GPS wireless circuit unit (reception circuit unit) is electrically connected to the upper end of the support member 40, and the position of the length lb is set upward from the lower end of the support member 40. The Wi-Fi circuit 70 may be electrically connected. In this case, three frequencies can be supported by electrically connecting the DTV circuit 60 to the lower end of the support member 40.

また、上述した実施例では、電極部４２及び電極部４４は、支持部材４０の上下方向の端部に設けられるが、それぞれ、上端側及び下端側に設けられる限り、支持部材４０の上端部や下端部よりも僅かに中央側に設けられてもよい。 Further, in the above-described embodiment, the electrode portion 42 and the electrode portion 44 are provided at the vertical end portions of the support member 40, but as long as they are provided at the upper end side and the lower end side, respectively, the upper end portion of the support member 40 and It may be provided slightly closer to the center than the lower end.

なお、以上の実施例に関し、さらに以下の付記を開示する。
（付記１）
筐体と、
導電性を有するアンテナ部材と、
前記筐体に対して前記アンテナ部材を支持し、導電性を有する支持部材と、
前記アンテナ部材の長さ方向における前記支持部材の一端側に電気的に接続され、前記アンテナ部材と前記支持部材との間が電気的に接続される第１状態において、前記アンテナ部材及び前記支持部材により形成される前記長さ方向の長さに対応する第１周波数の電波に係る処理を行う第１無線回路部と、
前記長さ方向における前記支持部材の他端側に電気的に接続され、前記アンテナ部材と前記支持部材との間が電気的に切断される第２状態において、前記支持部材の長さに対応する第２周波数の電波に係る処理を行う第２無線回路部とを含む、電子機器。
（付記２）
前記アンテナ部材に設けられ、電気的に絶縁性のある絶縁部材を更に含み、
前記絶縁部材は、前記第１状態と前記第２状態の間を切り替える、付記１に記載の電子機器。
（付記３）
前記絶縁部材は、前記第２状態において、前記支持部材と前記アンテナ部材との間に位置することで、前記アンテナ部材と前記支持部材との間を電気的に切断する、付記２に記載の電子機器。
（付記４）
前記アンテナ部材は、長さが可変なロッドアンテナであり、
前記第１状態は、前記アンテナ部材が第１長さであるときに形成され、
前記第２状態は、前記アンテナ部材が、前記第１長さよりも短い第２長さであるときに形成される、付記１〜３のうちのいずれか１項に記載の電子機器。
（付記５）
前記第２長さは、前記長さ方向における前記支持部材の長さよりも長い、付記４に記載の電子機器。
（付記６）
前記アンテナ部材は、前記筐体内に収容される収容状態と前記筐体外に伸長する伸長状態との間で伸縮可能なロッドアンテナであり、
前記第１状態は、前記アンテナ部材が伸長状態であるときに形成され、
前記第２状態は、前記アンテナ部材が収容状態であるときに形成される、付記１〜３のうちのいずれか１項に記載の電子機器。
（付記７）
前記絶縁部材は、前記長さ方向における前記アンテナ部材の端部であって、前記第１状態において前記支持部材から遠い側の端部に設けられる、付記２又は３に記載の電子機器。
（付記８）
前記支持部材は、円筒状の形態であり、
前記絶縁部材は、前記支持部材に対して同心状で且つ前記支持部材の内径よりも小さい外径を有する円筒状の形態であり、
前記アンテナ部材は、前記支持部材に対して同心状で且つ前記絶縁部材の内径よりも小さい外径を有する、付記７に記載の電子機器。
（付記９）
前記長さ方向における前記アンテナ部材の端部であって、前記第１状態において前記支持部材から遠い側の端部を第１端部とした場合、前記第１無線回路部が電気的に接続される前記支持部材の前記一端側は、前記第１状態における前記アンテナ部材の前記第１端部に対して遠い側である、付記１〜８のうちのいずれか１項に記載の電子機器。
（付記１０）
前記第２周波数は、前記第１周波数よりも高い、付記１〜９のうちのいずれか１項に記載の電子機器。
（付記１１）
前記第１無線回路部及び前記第２無線回路部は、基板上に形成される、付記１〜１０のうちのいずれか１項に記載の電子機器。
（付記１２）
前記第１無線回路部は、地上波テレビ放送用であり、前記第２無線回路部は、Ｗｉ−Ｆｉ用である、付記１〜１１のうちのいずれか１項に記載の電子機器。
（付記１３）
前記第２無線回路部は、前記第１状態においても、前記第２周波数の電波に係る処理を行う、付記１〜１２のうちのいずれか１項に記載の電子機器。
（付記１４）
導電性を有し、長さが可変であるアンテナ部材と、
前記アンテナ部材を支持し、導電性を有し、給電部が少なくとも２か所設けられる支持部材と、
前記アンテナ部材に設けられる絶縁部材とを含み、
前記絶縁部材は、前記アンテナ部材が第１長さであるときに、前記アンテナ部材と前記支持部材とを電気的に接続し、前記アンテナ部材が前記第１長さよりも短い第２長さであるときに、前記アンテナ部材と前記支持部材との間を電気的に切断する、アンテナ構造。 The following supplementary notes will be disclosed with respect to the above embodiments.
(Appendix 1)
A housing,
An antenna member having conductivity,
A supporting member that supports the antenna member with respect to the housing and has conductivity;
In a first state in which the antenna member is electrically connected to one end side of the support member in the longitudinal direction, and the antenna member and the support member are electrically connected, the antenna member and the support member A first radio circuit unit that performs processing relating to radio waves of a first frequency corresponding to the length in the length direction formed by
Corresponding to the length of the support member in the second state in which the other end of the support member in the length direction is electrically connected and the antenna member and the support member are electrically disconnected from each other. An electronic device, comprising: a second wireless circuit unit that performs a process related to a radio wave of a second frequency.
(Appendix 2)
The antenna member is further provided, and further includes an electrically insulating member.
The electronic device according to appendix 1, wherein the insulating member switches between the first state and the second state.
(Appendix 3)
The electronic device according to Appendix 2, wherein the insulating member is located between the support member and the antenna member in the second state to electrically disconnect the antenna member from the support member. machine.
(Appendix 4)
The antenna member is a rod antenna with a variable length,
The first state is formed when the antenna member has a first length,
4. The electronic device according to any one of appendices 1 to 3, wherein the second state is formed when the antenna member has a second length shorter than the first length.
(Appendix 5)
The electronic device according to appendix 4, wherein the second length is longer than the length of the support member in the length direction.
(Appendix 6)
The antenna member is a rod antenna that can expand and contract between a housed state housed in the housing and an extended state that extends outside the housing,
The first state is formed when the antenna member is in the extended state,
The electronic device according to any one of appendices 1 to 3, wherein the second state is formed when the antenna member is in the housed state.
(Appendix 7)
The electronic device according to appendix 2 or 3, wherein the insulating member is provided at an end portion of the antenna member in the length direction that is far from the support member in the first state.
(Appendix 8)
The support member has a cylindrical shape,
The insulating member has a cylindrical shape that is concentric with the support member and has an outer diameter smaller than the inner diameter of the support member,
8. The electronic device according to appendix 7, wherein the antenna member is concentric with the support member and has an outer diameter smaller than the inner diameter of the insulating member.
(Appendix 9)
When the end portion of the antenna member in the length direction that is far from the support member in the first state is the first end portion, the first wireless circuit portion is electrically connected. The electronic device according to any one of appendices 1 to 8, wherein the one end side of the support member is a side far from the first end portion of the antenna member in the first state.
(Appendix 10)
The electronic device according to any one of appendices 1 to 9, wherein the second frequency is higher than the first frequency.
(Appendix 11)
11. The electronic device according to any one of appendices 1 to 10, wherein the first wireless circuit unit and the second wireless circuit unit are formed on a substrate.
(Appendix 12)
The electronic device according to any one of appendices 1 to 11, wherein the first wireless circuit unit is for terrestrial television broadcasting, and the second wireless circuit unit is for Wi-Fi.
(Appendix 13)
13. The electronic device according to any one of appendices 1 to 12, wherein the second wireless circuit unit performs the process related to the radio wave of the second frequency even in the first state.
(Appendix 14)
An antenna member having conductivity and having a variable length,
A supporting member that supports the antenna member, has conductivity, and is provided with at least two power feeding portions;
Including an insulating member provided on the antenna member,
The insulating member electrically connects the antenna member and the support member when the antenna member has a first length, and the antenna member has a second length shorter than the first length. At times, an antenna structure for electrically disconnecting the antenna member and the support member.

１電子機器
１１筐体
２０ロッドアンテナ
２１ロッド部材
２２ロッド部材
２３ロッド部材
２４ロッド部材
２５第１ストッパ部材
２８第２ストッパ部材
４０支持部材
４２電極部
４４電極部
６０ＤＴＶ回路
６１整合回路
７０Ｗｉ−Ｆｉ回路
７１整合回路
８０基板
９０絶縁部材 1 Electronic Equipment 11 Housing 20 Rod Antenna 21 Rod Member 22 Rod Member 23 Rod Member 24 Rod Member 25 First Stopper Member 28 Second Stopper Member 40 Support Member 42 Electrode Part 44 Electrode Part 60 DTV Circuit 61 Matching Circuit 70 Wi-Fi Circuit 71 Matching circuit 80 Substrate 90 Insulation member

Claims

A housing,
An antenna member having conductivity,
A supporting member that supports the antenna member with respect to the housing and has conductivity;
In a first state in which the antenna member is electrically connected to one end side of the support member in the longitudinal direction, and the antenna member and the support member are electrically connected, the antenna member and the support member A first radio circuit unit that performs processing relating to radio waves of a first frequency corresponding to the length in the length direction formed by
Corresponding to the length of the support member in the second state in which the other end of the support member in the length direction is electrically connected and the antenna member and the support member are electrically disconnected from each other. An electronic device, comprising: a second wireless circuit unit that performs a process related to a radio wave of a second frequency.

The antenna member is further provided, and further includes an electrically insulating member.
The electronic device according to claim 1, wherein the insulating member switches between the first state and the second state.

The antenna member is a rod antenna with a variable length,
The first state is formed when the antenna member has a first length,
The electronic device according to claim 1, wherein the second state is formed when the antenna member has a second length shorter than the first length.

The electronic device according to claim 3, wherein the second length is longer than the length of the support member in the length direction.

When the end portion of the antenna member in the length direction that is far from the support member in the first state is the first end portion, the first wireless circuit portion is electrically connected. The electronic device according to any one of claims 1 to 4, wherein the one end side of the support member is a side far from the first end portion of the antenna member in the first state.

The electronic device according to claim 1, wherein the second frequency is higher than the first frequency.

The electronic device according to any one of claims 1 to 6, wherein the second wireless circuit unit performs processing related to the radio wave of the second frequency even in the first state.