JP5051296B2 - Antenna and wireless communication device - Google Patents

Antenna and wireless communication device Download PDF

Info

Publication number
JP5051296B2
JP5051296B2 JP2010504973A JP2010504973A JP5051296B2 JP 5051296 B2 JP5051296 B2 JP 5051296B2 JP 2010504973 A JP2010504973 A JP 2010504973A JP 2010504973 A JP2010504973 A JP 2010504973A JP 5051296 B2 JP5051296 B2 JP 5051296B2
Authority
JP
Japan
Prior art keywords
antenna
radiation electrode
variable circuit
frequency
end portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2010504973A
Other languages
Japanese (ja)
Other versions
JPWO2010016298A1 (en
Inventor
重雪 藤枝
一也 川端
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP2010504973A priority Critical patent/JP5051296B2/en
Publication of JPWO2010016298A1 publication Critical patent/JPWO2010016298A1/en
Application granted granted Critical
Publication of JP5051296B2 publication Critical patent/JP5051296B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H01Q9/145—Length of element or elements adjustable by varying the electrical length
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Description

この発明は、周波数可変回路を備えたアンテナ及び無線通信機に関するものである。   The present invention relates to an antenna having a frequency variable circuit and a radio communication device.

従来、この種のアンテナとして、例えば特許文献１及び特許文献２に開示されたものがある。   Conventionally, as this type of antenna, for example, there are antennas disclosed in Patent Document 1 and Patent Document 2.

図９に示すように、特許文献１に開示のアンテナ２００は、放射電極２０１と基体２０２と周波数可変回路２０３とで構成されている。そして、周波数可変回路２０３は、バリキャップダイオード２０４を有し、バリキャップダイオード２０４に印加する制御電圧Ｖで、バリキャップダイオード２０４の容量を変えることにより、放射電極２０１の共振周波数を変化させることができるようになっている。   As shown in FIG. 9, the antenna 200 disclosed in Patent Document 1 includes a radiation electrode 201, a base body 202, and a frequency variable circuit 203. The frequency variable circuit 203 includes a varicap diode 204, and can change the resonance frequency of the radiation electrode 201 by changing the capacitance of the varicap diode 204 with the control voltage V applied to the varicap diode 204. It can be done.

一方、図１０に示すように、特許文献２に開示のアンテナ３００は、高周波のＵＨＦ帯で用いる放射電極３０１と低周波のＲＦ−ＩＤ帯，ＦＭ帯及びＶＨＦ帯等で用いる追加放射電極３０２とを備えている。そして、追加放射電極３０２は、インダクタ３０３を介して、放射電極３０１の途中から分岐され、その先端部がリアクタンス可変回路３０４を介してグランド領域３０５に接地されている。インダクタ３０３は、ＵＨＦ帯の周波数以上の周波数に対して高インピーダンスとなるチョークコイルである。また、リアクタンス可変回路３０４は、追加放射電極３０２を含む追加アンテナ部３０６の共振周波数を制御することができる周波数可変回路である。   On the other hand, as shown in FIG. 10, an antenna 300 disclosed in Patent Document 2 includes a radiation electrode 301 used in a high frequency UHF band and an additional radiation electrode 302 used in a low frequency RF-ID band, FM band, VHF band, and the like. It has. Further, the additional radiation electrode 302 is branched from the middle of the radiation electrode 301 via the inductor 303, and the tip thereof is grounded to the ground region 305 via the reactance variable circuit 304. The inductor 303 is a choke coil having a high impedance with respect to a frequency equal to or higher than the frequency in the UHF band. The reactance variable circuit 304 is a frequency variable circuit that can control the resonance frequency of the additional antenna unit 306 including the additional radiation electrode 302.

特開２００６−０６０３８４号公報JP 2006-060384 A 特開２００７−１９４９９５号公報JP 2007-14995 A

しかし、上記した従来のアンテナでは、次のような問題がある。
まず、特許文献１に開示されたアンテナ２００では、１つの放射電極２０１しか有していないので、共振周波数を１つしか得ることができず、複共振化が不可能である。また、放射電極２０１に１つのバリキャップダイオード２０４の容量しか与えることができないので、共振周波数の可変範囲が狭く、広帯域化が困難である。However, the conventional antenna described above has the following problems.
First, since the antenna 200 disclosed in Patent Document 1 has only one radiation electrode 201, only one resonance frequency can be obtained, and multiple resonance cannot be achieved. Further, since only the capacity of one varicap diode 204 can be given to the radiation electrode 201, the variable range of the resonance frequency is narrow and it is difficult to increase the bandwidth.

次に、特許文献２に開示されたアンテナ３００は、放射電極３０１を用いたＵＨＦ帯の共振周波数と追加放射電極３０２を用いたＦＭ帯及びＶＨＦ帯等の共振周波数との２共振構成であるが、追加放射電極３０２が、ＵＨＦ帯の周波数以上の周波数に対して高インピーダンスとなるインダクタ３０３を介して放射電極３０１に接続されているので、そのままでは、ＵＨＦ帯での複共振化が不可能である。これに対して、追加放射電極３０２を長くすることにより、ＵＨＦ帯での２共振化が可能となるが、放射電極３０２を長くすると、アンテナサイズが大きくなってしまう。そこで、インダクタ３０３のインダクタンス値を大きくして、チョーク機能をなくすことで、追加放射電極３０２を長くすることなく、ＵＨＦ帯での２共振化を図る方法が考えられる。しかし、インダクタ３０３のインダクタンス値を大きくすると、インダクタ３０３による挿入ロスが大きくなり、アンテナ利得が劣化してしまうという問題が発生する。   Next, the antenna 300 disclosed in Patent Document 2 has a two-resonance configuration of a resonance frequency in the UHF band using the radiation electrode 301 and a resonance frequency such as an FM band and a VHF band using the additional radiation electrode 302. Since the additional radiation electrode 302 is connected to the radiation electrode 301 via the inductor 303 having a high impedance with respect to a frequency equal to or higher than the frequency in the UHF band, it is impossible to achieve multiple resonance in the UHF band as it is. is there. On the other hand, by making the additional radiation electrode 302 longer, two resonances in the UHF band can be realized, but if the radiation electrode 302 is made longer, the antenna size becomes larger. In view of this, it is conceivable to increase the inductance value of the inductor 303 so as to eliminate the choke function and thereby achieve two resonances in the UHF band without lengthening the additional radiation electrode 302. However, when the inductance value of the inductor 303 is increased, the insertion loss due to the inductor 303 increases and the antenna gain deteriorates.

この発明は、上述した課題を解決するためになされたもので、アンテナサイズを小型にした状態で、アンテナ利得を劣化させることなく、ＵＨＦ帯等の所望帯域における複共振化が可能であり、しかも、共振周波数の広帯域化が可能なアンテナ及び無線通信機を提供することを目的とする。   The present invention has been made to solve the above-described problems, and can achieve multiple resonances in a desired band such as the UHF band without deteriorating the antenna gain while the antenna size is reduced. An object of the present invention is to provide an antenna and a wireless communication device capable of widening the resonance frequency.

上記課題を解決するために、請求項１の発明は、そのリアクタンス値を変化させることで第１の共振周波数を変化させることができる第１の周波数可変回路を有した第１のアンテナ部と、そのリアクタンス値を変化させることで第２の共振周波数を変化させることができる第２の周波数可変回路を有した第２のアンテナ部とを備えるアンテナであって、第１のアンテナ部を、基端部が給電部に接続された第１の放射電極と、一方端がこの第１の放射電極の先端部に接続された第１の周波数可変回路と、基端部がこの第１の周波数可変回路の他方端に接続され且つ開放状態の先端部が基端部側に廻り込んで隣り合うループ状の第２の放射電極とで構成し、第２のアンテナ部を、第１の放射電極と、一方端がこの第１の放射電極の先端部に接続された第２の周波数可変回路と、基端部がこの第２の周波数可変回路の他方端に接続され、且つ開放状態の先端部が第２の放射電極の途中部に近接して途中部に容量結合した第３の放射電極と、当該第２の放射電極とで構成した。
かかる構成により、第１のアンテナ部により、第１の共振周波数で送受信することができ、第２のアンテナ部により、第２の共振周波数で送受信することができる。このとき、第１の周波数可変回路を用いて、そのリアクタンス値を変化させることで、第１の共振周波数を変化させることができ、第２の周波数可変回路を用いて、そのリアクタンス値を変化させることで、第２の共振周波数を変化させることができる。したがって、このアンテナを用いることで、２共振化を図ることができる。
そして、第１のアンテナ部を、第１の放射電極と第１の周波数可変回路とループ状の第２の放射電極とで構成し、第２のアンテナ部を、第１の放射電極と第２の周波数可変回路と第２の放射電極に容量結合した第３の放射電極と第２の放射電極とで構成したので、これら第１のアンテナ部のアンテナ長と第２のアンテナ部のアンテナ長とを近づけることができ、この結果、第１の共振周波数と第２の共振周波数とが近づき、これら第１及び第２の共振周波数をＵＨＦ帯等、所望の同一周波数帯域内に配することができる。
しかも、第３の放射電極を第２の放射電極に容量結合した構成であるので、第３の放射電極の長さを短くした状態で、第２の周波数可変回路のインダクタンス値を大きくすることなく、第２のアンテナ部のアンテナ長を長くすることができる。この結果、第２の周波数可変回路を構成する集中定数素子による挿入ロスを減らすことができ、第２のアンテナ部のアンテナ利得の劣化を防止することができる。In order to solve the above-mentioned problem, the invention of claim 1 includes a first antenna unit having a first frequency variable circuit capable of changing a first resonance frequency by changing a reactance value thereof; An antenna including a second antenna unit having a second frequency variable circuit capable of changing the second resonance frequency by changing the reactance value, wherein the first antenna unit is A first radiating electrode whose portion is connected to the power feeding portion, a first frequency variable circuit whose one end is connected to the tip of the first radiating electrode, and a base end portion of the first frequency variable circuit. A distal end portion in an open state that is connected to the other end of the first end portion of the base end portion and is adjacent to the second radiation electrode in the form of a loop, and the second antenna portion is a first radiation electrode; One end is connected to the tip of the first radiation electrode. The second frequency variable circuit and the base end portion are connected to the other end of the second frequency variable circuit, and the open end portion is close to the middle portion of the second radiation electrode and has a capacitance in the middle portion. It comprised with the couple | bonded 3rd radiation electrode and the said 2nd radiation electrode.
With this configuration, transmission / reception can be performed at the first resonance frequency by the first antenna unit, and transmission / reception can be performed at the second resonance frequency by the second antenna unit. At this time, the first resonance frequency can be changed by changing the reactance value using the first frequency variable circuit, and the reactance value can be changed using the second frequency variable circuit. Thus, the second resonance frequency can be changed. Therefore, by using this antenna, two resonances can be achieved.
The first antenna unit is configured by the first radiation electrode, the first frequency variable circuit, and the loop-shaped second radiation electrode, and the second antenna unit is configured by the first radiation electrode and the second radiation electrode. Since the third variable frequency circuit, the third radiation electrode capacitively coupled to the second radiation electrode, and the second radiation electrode, the antenna length of the first antenna section and the antenna length of the second antenna section are As a result, the first resonance frequency and the second resonance frequency approach each other, and the first and second resonance frequencies can be arranged in a desired same frequency band such as the UHF band. .
In addition, since the third radiation electrode is capacitively coupled to the second radiation electrode, the inductance value of the second variable frequency circuit is not increased while the length of the third radiation electrode is shortened. The antenna length of the second antenna portion can be increased. As a result, it is possible to reduce insertion loss due to the lumped constant elements constituting the second frequency variable circuit, and to prevent deterioration of the antenna gain of the second antenna unit.

請求項２の発明は、請求項１に記載のアンテナにおいて、第１の放射電極と、一方端がこの第１の放射電極の先端部に接続され且つそのリアクタンス値を変化させることで第ｎ（ｎ＝３以上の整数）の共振周波数を変化させることができる第ｎの周波数可変回路と、基端部がこの第ｎの周波数可変回路の他方端に接続され、且つ開放状態の先端部が第２の放射電極の途中部に近接して途中部に容量結合した第ｎ＋１の放射電極と、当該第２の放射電極とで構成される第ｎのアンテナ部を追加した構成とする。
かかる構成により、最大ｎ数の多共振化を図ることができる。According to a second aspect of the present invention, there is provided the antenna according to the first aspect, wherein the first radiation electrode and one end thereof are connected to the tip of the first radiation electrode and the reactance value thereof is changed to change the nth ( n = an integer greater than or equal to 3) and the base end is connected to the other end of the nth frequency variable circuit, and the open front end is the first. In this configuration, an (n + 1) th radiation electrode capacitively coupled to the middle portion of the second radiation electrode and an nth antenna portion including the second radiation electrode are added.
With this configuration, it is possible to achieve a maximum of n resonances.

請求項３の発明は、請求項１又は請求項２に記載のアンテナにおいて、第２の放射電極の開放状態の先端部と基端部側とを近接させて容量結合させた構成とする。
かかる構成により、第２の放射電極の先端部と基端部とを容量結合したので、第１の周波数可変回路のインダクタンス値を大きくすることなく、第１のアンテナ部のアンテナ長を長くすることができる。この結果、第１の周波数可変回路を構成する集中定数素子による挿入ロスを減らすことができ、第１のアンテナ部のアンテナ利得の劣化を防止することができる。According to a third aspect of the present invention, in the antenna according to the first or second aspect, the open end and the base end of the second radiation electrode are brought close to each other and capacitively coupled.
With this configuration, since the distal end portion and the proximal end portion of the second radiation electrode are capacitively coupled, the antenna length of the first antenna portion can be increased without increasing the inductance value of the first frequency variable circuit. Can do. As a result, it is possible to reduce insertion loss due to the lumped constant element constituting the first frequency variable circuit, and to prevent deterioration of the antenna gain of the first antenna unit.

請求項４の発明は、請求項１ないし請求項３のいずれかに記載のアンテナにおいて、第１のアンテナ部ないし第ｎのアンテナ部のいずれか又は全てを誘電体ブロック上に形成した構成とする。
かかる構成により、誘電体ブロックの誘電率を変化させることで、第３の放射電極の先端部と第２の放射電極の途中部との間の容量値や、第２の放射電極の先端部，基端部間の容量値を任意に変化させることができる。According to a fourth aspect of the present invention, in the antenna according to any one of the first to third aspects, any or all of the first antenna unit to the nth antenna unit are formed on a dielectric block. .
With this configuration, by changing the dielectric constant of the dielectric block, the capacitance value between the tip of the third radiation electrode and the middle of the second radiation electrode, the tip of the second radiation electrode, The capacitance value between the base ends can be arbitrarily changed.

請求項５の発明は、請求項１ないし請求項４のいずれかに記載のアンテナにおいて、第１の周波数可変回路ないし第ｎの周波数可変回路は、その容量値を制御電圧で変化可能な可変容量ダイオードを含む構成とした。   According to a fifth aspect of the present invention, in the antenna according to any one of the first to fourth aspects, the first frequency variable circuit to the nth frequency variable circuit have a variable capacitance whose capacitance value can be changed by a control voltage. A configuration including a diode was adopted.

請求項６の発明に係る無線通信機は、 請求項１ないし請求項５のいずれかに記載のアンテナを具備する構成とした。   According to a sixth aspect of the present invention, a wireless communication device includes the antenna according to any one of the first to fifth aspects.

以上詳しく説明したように、この発明のアンテナによれば、ＵＨＦ帯等の所望帯域内における２共振化が可能となるという優れた効果がある。また、アンテナサイズの小型化を図ることができると共に、第２のアンテナ部のアンテナ利得の劣化を防止することができるという効果もある。   As described above in detail, according to the antenna of the present invention, there is an excellent effect that two resonances can be achieved in a desired band such as the UHF band. In addition, the antenna size can be reduced, and the antenna gain of the second antenna portion can be prevented from being deteriorated.

そして、請求項２の発明に係るアンテナによれば、さらなる多共振化を図ることができる。   According to the antenna of the second aspect of the invention, further multiple resonances can be achieved.

また、請求項３の発明に係るアンテナによれば、第１のアンテナ部のアンテナ利得の劣化を防止することができる。   According to the antenna of the third aspect of the present invention, it is possible to prevent deterioration of the antenna gain of the first antenna unit.

請求項４の発明に係るアンテナによれば、容量結合部分の容量値を任意に変化させることができる。   According to the antenna of the fourth aspect, the capacitance value of the capacitive coupling portion can be arbitrarily changed.

請求項６の発明によれば、ＵＨＦ帯等の所望帯域内における２共振化が可能で、アンテナサイズの小型化を図ることができると共に、アンテナ利得の劣化を防止することが可能な無線通信機を提供することができる。   According to the sixth aspect of the invention, a radio communication apparatus capable of achieving two resonances in a desired band such as the UHF band, reducing the antenna size, and preventing deterioration of the antenna gain. Can be provided.

この発明の第１実施例に係るアンテナを示す概略平面図である。1 is a schematic plan view showing an antenna according to a first embodiment of the present invention. アンテナの作用を説明するための概略平面図である。It is a schematic plan view for demonstrating the effect | action of an antenna. 各共振周波数の変化状態を示す線図である。It is a diagram which shows the change state of each resonance frequency. この発明の第２実施例に係るアンテナを示す概略平面図である。It is a schematic plan view which shows the antenna which concerns on 2nd Example of this invention. 周波数可変回路の変形例を示す概略平面図である。It is a schematic plan view which shows the modification of a frequency variable circuit. この発明の第３実施例に係るアンテナを示す概略平面図である。It is a schematic plan view which shows the antenna which concerns on 3rd Example of this invention. この発明の第４実施例に係るアンテナを示す概略平面図である。It is a schematic plan view which shows the antenna which concerns on 4th Example of this invention. この発明の第５実施例に係るアンテナを示す概略斜視図である。It is a schematic perspective view which shows the antenna which concerns on 5th Example of this invention. 第１の従来例に係るアンテナを示す概略斜視図である。It is a schematic perspective view which shows the antenna which concerns on a 1st prior art example. 第２の従来例に係るアンテナを示す概略平面図である。It is a schematic plan view which shows the antenna which concerns on a 2nd prior art example.

１−１〜１−５…アンテナ、 Ａ１，Ａ２，Ａ３〜Ａｎ…アンテナ部、 ３−１，３−２，３−３〜３−ｎ…周波数可変回路、 ４，５，６，６−３〜６−ｎ…放射電極、 ７…誘電体ブロック、 ３０〜３２…リアクタンス回路、 ４０，５０，６０…基端部、 ４１，５１，６１…先端部、 ５２…途中部、 １００…基板、 １０１…非グランド領域、 １０２…グランド領域、 １１０…給電部、 Ａ１，Ａ２，Ａ３〜Ａｎ…アンテナ部、 Ｃ１〜Ｃｎ…容量、 Ｄ０，Ｄ１，Ｄ２…可変容量ダイオード、 Ｇ１，Ｇ２…間隙、 Ｉ…電流、 Ｌ０〜Ｌｎ…インダクタ、 ｆ１…共振周波数、 ｆ１，ｆ２…共振周波数。   1-1 to 1-5 ... antenna, A1, A2, A3 to An ... antenna part, 3-1, 3-2, 3-3 to 3-n ... frequency variable circuit, 4, 5, 6, 6-3 6-n: Radiation electrode, 7: Dielectric block, 30-32 ... Reactance circuit, 40, 50, 60 ... Base end part, 41, 51, 61 ... Tip part, 52 ... Middle part, 100 ... Substrate, 101 ... Non-ground region, 102 ... Ground region, 110 ... Power feeding portion, A1, A2, A3-An ... Antenna portion, C1-Cn ... Capacitance, D0, D1, D2 ... Variable capacitance diode, G1, G2 ... Gap, I ... Current, L0 to Ln: Inductor, f1: Resonance frequency, f1, f2: Resonance frequency.

以下、この発明の最良の形態について図面を参照して説明する。   The best mode of the present invention will be described below with reference to the drawings.

図１は、この発明の第１実施例に係るアンテナを示す概略平面図である。
図１に示すように、この実施例のアンテナ１−１は、第１のアンテナ部としてのアンテナ部Ａ１と第２のアンテナ部としてのアンテナ部Ａ２とを備え、携帯電話等の無線通信機に内蔵される基板１００の非グランド領域１０１に形成されている。FIG. 1 is a schematic plan view showing an antenna according to a first embodiment of the present invention.
As shown in FIG. 1, the antenna 1-1 of this embodiment includes an antenna unit A1 as a first antenna unit and an antenna unit A2 as a second antenna unit, and is used in a wireless communication device such as a mobile phone. It is formed in the non-ground region 101 of the substrate 100 to be incorporated.

アンテナ部Ａ１は、第１の共振周波数である共振周波数ｆ１で共振するアンテナ部である。このアンテナ部Ａ１は、第１の周波数可変回路である周波数可変回路３−１を有し、この周波数可変回路３−１のリアクタンス値を変化させることで、アンテナ部Ａ１の共振周波数ｆ１を変化させることができるようになっている。
具体的には、この周波数可変回路３−１と、第１の放射電極としての放射電極４と、第２の放射電極としてのループ状の放射電極５とで構成されている。The antenna unit A1 is an antenna unit that resonates at the resonance frequency f1 that is the first resonance frequency. The antenna unit A1 includes a frequency variable circuit 3-1 that is a first frequency variable circuit, and changes the reactance value of the frequency variable circuit 3-1, thereby changing the resonance frequency f1 of the antenna unit A1. Be able to.
Specifically, the frequency variable circuit 3-1, the radiation electrode 4 as the first radiation electrode, and the loop-shaped radiation electrode 5 as the second radiation electrode are configured.

放射電極４は、その基端部４０を給電部１１０に接続した状態で、非グランド領域１０１にパターン形成されている。具体的には、インダクタ１１１が給電部１１０と放射電極４の基端部４０とに接続され、インダクタ１１２が給電部１１０とグランド領域１０２とに接続されており、整合回路がこれらインダクタ１１１，１１２とによって非グランド領域１０１上に形成されている。これにより、放射電極４の基端部４０がこの整合回路を介して給電部１１０に接続された状態になっている。   The radiation electrode 4 is patterned in the non-ground region 101 with the base end portion 40 connected to the power feeding portion 110. Specifically, the inductor 111 is connected to the power supply unit 110 and the base end portion 40 of the radiation electrode 4, the inductor 112 is connected to the power supply unit 110 and the ground region 102, and a matching circuit is connected to the inductors 111 and 112. Are formed on the non-ground region 101. Thereby, the base end part 40 of the radiation electrode 4 is in a state of being connected to the power feeding part 110 via the matching circuit.

周波数可変回路３−１は、その一方端がこの放射電極４の先端部４１に接続され、他方端が放射電極５の基端部５０に接続された状態で、放射電極４と放射電極５との間に介設されている。
具体的には、周波数可変回路３−１は、放射電極４の先端部４１に接続した可変のリアクタンス回路３０と放射電極５の基端部５０に接続したリアクタンス回路３１とを接続した構成になっている。そして、同調電圧源１２０からの制御電圧としての同調電圧Ｖcをこれらのリアクタンス回路３０，３１に印加して、リアクタンス値を変えることにより、アンテナ部Ａ１の共振周波数ｆ１を制御することができるようになっている。The variable frequency circuit 3-1 has one end connected to the distal end portion 41 of the radiation electrode 4 and the other end connected to the proximal end portion 50 of the radiation electrode 5. It is interposed between.
Specifically, the frequency variable circuit 3-1 has a configuration in which a variable reactance circuit 30 connected to the distal end portion 41 of the radiation electrode 4 and a reactance circuit 31 connected to the proximal end portion 50 of the radiation electrode 5 are connected. ing. Then, by applying the tuning voltage Vc as the control voltage from the tuning voltage source 120 to the reactance circuits 30 and 31 and changing the reactance value, the resonance frequency f1 of the antenna unit A1 can be controlled. It has become.

放射電極５は、周波数可変回路３−１のリアクタンス回路３１に接続された基端部５０から延出し、ループを描き、その先端部５１が基端部５０側に回り込んで、基端部５０と隣り合った形状をしている。すなわち、放射電極５は、全体としてループ状をなし、その先端部５１が間隙Ｇ１を介して基端部５０に対向している。   The radiation electrode 5 extends from the proximal end portion 50 connected to the reactance circuit 31 of the frequency variable circuit 3-1, draws a loop, and the distal end portion 51 wraps around the proximal end portion 50 side, and the proximal end portion 50 is drawn. It has a shape next to it. That is, the radiation electrode 5 has a loop shape as a whole, and the distal end portion 51 faces the proximal end portion 50 via the gap G1.

かかる構成のアンテナ部Ａ１の送受信帯域は、ＵＨＦ帯であり、周波数可変回路３−１のリアクタンス回路３０，３１のリアクタンス値と放射電極４，５の長さがＵＨＦ帯の共振周波数ｆ１で共振するように設定されている。   The transmission / reception band of the antenna unit A1 having such a configuration is the UHF band, and the reactance values of the reactance circuits 30 and 31 of the frequency variable circuit 3-1 and the lengths of the radiation electrodes 4 and 5 resonate at the resonance frequency f1 of the UHF band. Is set to

一方、アンテナ部Ａ２は、第２の共振周波数である共振周波数ｆ２で共振するアンテナ部である。このアンテナ部Ａ２は、第２の周波数可変回路である周波数可変回路３−２を有し、この周波数可変回路３−２のリアクタンス値を変化させることで、アンテナ部Ａ２の共振周波数ｆ２を変化させることができるようになっている。
具体的には、放射電極４と周波数可変回路３−２と第３の放射電極としての放射電極６と放射電極５とで、アンテナ部Ａ２を構成した。On the other hand, the antenna portion A2 is an antenna portion that resonates at the resonance frequency f2 that is the second resonance frequency. The antenna unit A2 includes a frequency variable circuit 3-2 that is a second frequency variable circuit, and changes the reactance value of the frequency variable circuit 3-2 to change the resonance frequency f2 of the antenna unit A2. Be able to.
Specifically, the antenna portion A2 is configured by the radiation electrode 4, the frequency variable circuit 3-2, the radiation electrode 6 as the third radiation electrode, and the radiation electrode 5.

周波数可変回路３−２は、その一方端が放射電極４の先端部４１に接続され、他方端が放射電極６の基端部６０に接続された状態で、放射電極４と放射電極６との間に介設されている。
具体的には、周波数可変回路３−２は、リアクタンス回路３０と放射電極６の基端部６０に接続したリアクタンス回路３２とを接続した構成になっている。そして、同調電圧源１２０からの制御電圧としての同調電圧Ｖcをこれらのリアクタンス回路３０，３２に印加して、リアクタンス値を変えることにより、アンテナ部Ａ２の共振周波数ｆ２を制御することができるようになっている。The frequency variable circuit 3-2 is connected between the radiation electrode 4 and the radiation electrode 6 with one end connected to the distal end portion 41 of the radiation electrode 4 and the other end connected to the proximal end portion 60 of the radiation electrode 6. It is interposed between.
Specifically, the frequency variable circuit 3-2 has a configuration in which a reactance circuit 30 and a reactance circuit 32 connected to the proximal end portion 60 of the radiation electrode 6 are connected. Then, by applying a tuning voltage Vc as a control voltage from the tuning voltage source 120 to the reactance circuits 30 and 32 and changing the reactance value, the resonance frequency f2 of the antenna unit A2 can be controlled. It has become.

放射電極６は、周波数可変回路３−２のリアクタンス回路３２に接続された基端部６０から放射電極５に沿って延出し、開放状態の先端部６１が放射電極５の途中部５２に近接している。具体的には、放射電極６の先端部６１が、狭い間隙Ｇ２を介して放射電極５の途中部５２に近接し、放射電極６が、先端部６１と途中部５２との間に生じた分布定数型の容量Ｃ２を通じて放射電極５の途中部５２に容量結合している。   The radiation electrode 6 extends along the radiation electrode 5 from the base end portion 60 connected to the reactance circuit 32 of the frequency variable circuit 3-2, and the open distal end portion 61 is close to the middle portion 52 of the radiation electrode 5. ing. Specifically, the distal end portion 61 of the radiation electrode 6 approaches the middle portion 52 of the radiation electrode 5 via the narrow gap G2, and the radiation electrode 6 is generated between the distal end portion 61 and the middle portion 52. It is capacitively coupled to the middle part 52 of the radiation electrode 5 through a constant type capacitor C2.

このように、アンテナ部Ａ２を、放射電極４と周波数可変回路３−２と放射電極６と放射電極５とで構成したので、アンテナ部Ａ２のアンテナ長をアンテナ部Ａ１のアンテナ長に近づけることができる。
したがって、周波数可変回路３−２のリアクタンス回路３０，３２のリアクタンス値と放射電極４，５，６の長さを、ＵＨＦ帯の共振周波数ｆ２で共振するように設定することができ、アンテナ部Ａ２をアンテナ部Ａ１と同じＵＨＦ帯で送受信することが可能である。
しかも、放射電極６を放射電極５に容量結合して、ループ状の放射電極５をアンテナ部Ａ２のアンテナ長に含める構成であるので、放射電極６の長さが短くて済む。このため、周波数可変回路３−２を構成する集中定数素子のインダクタンス値を小さく抑えることができる。
なお、符号１３０は、グランド電位をとるためのインダクタである。As described above, since the antenna part A2 is configured by the radiation electrode 4, the frequency variable circuit 3-2, the radiation electrode 6 and the radiation electrode 5, the antenna length of the antenna part A2 can be brought close to the antenna length of the antenna part A1. it can.
Accordingly, the reactance values of the reactance circuits 30 and 32 of the frequency variable circuit 3-2 and the lengths of the radiation electrodes 4, 5, and 6 can be set to resonate at the resonance frequency f2 in the UHF band, and the antenna unit A2 Can be transmitted and received in the same UHF band as the antenna unit A1.
In addition, since the radiation electrode 6 is capacitively coupled to the radiation electrode 5 and the loop-shaped radiation electrode 5 is included in the antenna length of the antenna part A2, the length of the radiation electrode 6 can be shortened. For this reason, the inductance value of the lumped constant element constituting the frequency variable circuit 3-2 can be kept small.
Reference numeral 130 denotes an inductor for taking a ground potential.

次に、この実施例のアンテナ１−１が示す作用及び効果について説明する。
図２は、アンテナ１−１の作用を説明するための概略平面図であり、図２の（ａ）は、アンテナ部Ａ１の作用を示し、図２の（ｂ）は、アンテナ部Ａ２の作用を示す。また、図３は、各共振周波数の変化状態を示す線図である。
図１において、共振周波数ｆ１の電流を給電部１１０から放射電極４に供給すると、アンテナ部Ａ１が共振して、共振周波数ｆ１の電波を送信する。また、外部からの共振周波数ｆ１の電波に共振して受信する。かかる場合には、図２の（ａ）に示すように、共振周波数ｆ１の電流Ｉが、アンテナ部Ａ１の放射電極４から周波数可変回路３−１のリアクタンス回路３０，３１を通じてループ状の放射電極５に流れて、アンテナ部Ａ１が励振状態になり、図３の実線曲線Ｓ１で示すように、ＵＨＦ帯内の共振周波数ｆ１で共振する。
一方、図１において、共振周波数ｆ２の電流を給電部１１０から放射電極４に供給すると、アンテナ部Ａ２が共振して、共振周波数ｆ２の電波を送信する。また、外部からの共振周波数ｆ２の電波に共振して受信する。かかる場合には、図２の（ｂ）に示すように、共振周波数ｆ２の電流Ｉが、アンテナ部Ａ２の放射電極４から周波数可変回路３−２のリアクタンス回路３０，３２を通じて放射電極６に流れる。そして、放射電極６上の電流Ｉは、放射電極６と放射電極５との容量結合によって生じた容量Ｃ２を通じてループ状の放射電極５に流れ、アンテナ部Ａ２が励振状態になる。このとき、放射電極６から放射電極４に流入した電流Ｉは、共振周波数ｆ２の大きさに応じて、実線で示す方向又は破線で示す方向のいずれかの方向に流れ、図３の実線曲線Ｓ２で示すように、ＵＨＦ帯内の共振周波数ｆ２で共振する。Next, functions and effects exhibited by the antenna 1-1 of this embodiment will be described.
2A and 2B are schematic plan views for explaining the operation of the antenna 1-1. FIG. 2A shows the operation of the antenna unit A1, and FIG. 2B shows the operation of the antenna unit A2. Indicates. FIG. 3 is a diagram showing a change state of each resonance frequency.
In FIG. 1, when a current having a resonance frequency f1 is supplied from the power feeding unit 110 to the radiation electrode 4, the antenna unit A1 resonates and transmits a radio wave having the resonance frequency f1. In addition, it resonates with an external radio wave having a resonance frequency f1 and receives it. In this case, as shown in FIG. 2 (a), the current I having the resonance frequency f1 flows from the radiation electrode 4 of the antenna part A1 through the reactance circuits 30 and 31 of the frequency variable circuit 3-1. 5, the antenna unit A1 enters an excited state, and resonates at the resonance frequency f1 in the UHF band as indicated by the solid curve S1 in FIG.
On the other hand, in FIG. 1, when a current having a resonance frequency f2 is supplied from the power feeding unit 110 to the radiation electrode 4, the antenna unit A2 resonates and transmits a radio wave having the resonance frequency f2. Further, the signal is received by resonating with an external radio wave having a resonance frequency f2. In such a case, as shown in FIG. 2B, the current I having the resonance frequency f2 flows from the radiation electrode 4 of the antenna unit A2 to the radiation electrode 6 through the reactance circuits 30 and 32 of the frequency variable circuit 3-2. . Then, the current I on the radiation electrode 6 flows to the loop-shaped radiation electrode 5 through the capacitance C2 generated by capacitive coupling between the radiation electrode 6 and the radiation electrode 5, and the antenna portion A2 enters an excited state. At this time, the current I flowing from the radiation electrode 6 into the radiation electrode 4 flows in either the direction indicated by the solid line or the direction indicated by the broken line according to the magnitude of the resonance frequency f2, and the solid line curve S2 in FIG. As shown by, resonance occurs at the resonance frequency f2 in the UHF band.

そして、図２の（ａ）に示す状態において、同調電圧Ｖcを同調電圧源１２０から周波数可変回路３−１に印加して、リアクタンス回路３０，３１のリアクタンス値を変化させると、図３の破線曲線Ｓ１で示すように、共振周波数ｆ１をＵＨＦ帯内で自由に変化させることができる。また、図２の（ｂ）に示す状態において、同調電圧Ｖcを同調電圧源１２０から周波数可変回路３−２に印加して、リアクタンス回路３０，３２のリアクタンス値を変化させると、図３の破線曲線Ｓ２で示すように、共振周波数ｆ２をＵＨＦ帯内で自由に変化させることができる。   In the state shown in FIG. 2A, when the tuning voltage Vc is applied from the tuning voltage source 120 to the frequency variable circuit 3-1, and the reactance values of the reactance circuits 30 and 31 are changed, the broken line in FIG. As indicated by the curve S1, the resonance frequency f1 can be freely changed within the UHF band. 2B, when the tuning voltage Vc is applied from the tuning voltage source 120 to the frequency variable circuit 3-2 to change the reactance values of the reactance circuits 30 and 32, the broken line in FIG. As indicated by the curve S2, the resonance frequency f2 can be freely changed within the UHF band.

以上のように、この実施例のアンテナ１−１によれば、ＵＨＦ帯内での２共振化を図ることができ、しかも、同調電圧Ｖcによって共振周波数ｆ１，ｆ２を広い帯域内でそれぞれ独立に制御することができる。   As described above, according to the antenna 1-1 of this embodiment, two resonances can be achieved in the UHF band, and the resonance frequencies f1 and f2 can be independently set within a wide band by the tuning voltage Vc. Can be controlled.

次に、この発明の第２実施例について説明する。
図４は、この発明の第２実施例に係るアンテナを示す概略平面図である。
この実施例のアンテナ１−２では、周波数可変回路３−１，３−２が、その容量値を制御電圧で変化可能な可変容量ダイオードを含んでいる。
すなわち、リアクタンス回路３０を、放射電極４の先端部４１に接続されたインダクタＬ０と、このインダクタＬ０にアノード側を接続した可変容量ダイオードＤ０とで構成した。そして、リアクタンス回路３１を可変容量ダイオードＤ０のカソード側にカソード側を接続した可変容量ダイオードＤ１と、この可変容量ダイオードＤ１のアノード側と放射電極５の基端部５０との間に接続されたインダクタＬ１とで構成した。さらに、リアクタンス回路３２を可変容量ダイオードＤ０，Ｄ１のカソード側と放射電極６の基端部６０との間に接続されたインダクタＬ２で構成した。
そして、同調電圧源１２０を、高周波カット用抵抗１２１，１２３及びＤＣパスコンデンサ１２２を介して、これら可変容量ダイオードＤ０，Ｄ１のカソードとインダクタＬ２との接続点Ｐに接続した。
これにより、同調電圧源１２０からの同調電圧Ｖcを接続点Ｐに印加すると、可変容量ダイオードＤ０，Ｄ１の容量値が同調電圧Ｖcの大きさに対応して変化する。Next explained is the second embodiment of the invention.
FIG. 4 is a schematic plan view showing an antenna according to the second embodiment of the present invention.
In the antenna 1-2 of this embodiment, the frequency variable circuits 3-1 and 3-2 include variable capacitance diodes whose capacitance values can be changed by a control voltage.
That is, the reactance circuit 30 is composed of an inductor L0 connected to the tip 41 of the radiation electrode 4 and a variable capacitance diode D0 having an anode connected to the inductor L0. A variable capacitance diode D1 having a reactance circuit 31 connected to the cathode side of the variable capacitance diode D0 on the cathode side, and an inductor connected between the anode side of the variable capacitance diode D1 and the base end portion 50 of the radiation electrode 5 And L1. Further, the reactance circuit 32 is configured by an inductor L2 connected between the cathode side of the variable capacitance diodes D0 and D1 and the base end portion 60 of the radiation electrode 6.
The tuning voltage source 120 was connected to the connection point P between the cathodes of the variable capacitance diodes D0 and D1 and the inductor L2 via the high frequency cut resistors 121 and 123 and the DC pass capacitor 122.
Thus, when the tuning voltage Vc from the tuning voltage source 120 is applied to the connection point P, the capacitance values of the variable capacitance diodes D0 and D1 change corresponding to the magnitude of the tuning voltage Vc.

かかる構成により、第１実施例と同様に、放射電極６を放射電極５に容量結合して、放射電極５をアンテナ部Ａ２のアンテナ長に含める構成であるので、放射電極６の長さが短くて済む。このため、周波数可変回路３−２を構成する集中定数素子のインダクタＬ２のインダクタンス値を小さく抑えることができ、アンテナ１−２の小型化を図りつつ、アンテナ部Ａ２のアンテナ利得の劣化を防止することができる。   With this configuration, as in the first embodiment, the radiation electrode 6 is capacitively coupled to the radiation electrode 5 and the radiation electrode 5 is included in the antenna length of the antenna portion A2. Therefore, the length of the radiation electrode 6 is short. I'll do it. For this reason, the inductance value of the inductor L2 of the lumped constant element constituting the frequency variable circuit 3-2 can be kept small, and the antenna gain of the antenna unit A2 is prevented from deteriorating while the antenna 1-2 is downsized. be able to.

なお、この実施例では、リアクタンス回路３２をインダクタＬ２で構成した例を示したが、例えば、図５に示すように、リアクタンス回路３２を、可変容量ダイオードＤ０，Ｄ１のカソード側にカソード側を接続した可変容量ダイオードＤ２と、この可変容量ダイオードＤ２のアノード側と放射電極６の基端部６０との間に接続されたインダクタＬ２とで構成しても良いことは勿論である。
その他の構成、作用及び効果は、上記第１実施例と同様であるので、その記載は省略する。In this embodiment, an example in which the reactance circuit 32 is configured by the inductor L2 is shown. For example, as shown in FIG. 5, the reactance circuit 32 is connected to the cathode side of the variable capacitance diodes D0 and D1. Of course, the variable capacitance diode D2 and the inductor L2 connected between the anode side of the variable capacitance diode D2 and the base end portion 60 of the radiation electrode 6 may be used.
Since other configurations, operations, and effects are the same as those in the first embodiment, description thereof is omitted.

次に、この発明の第３実施例について説明する。
図６は、この発明の第３実施例に係るアンテナを示す概略平面図である。
図６に示すように、この実施例のアンテナ１−３は、多共振化を図っている点が、上記第１及び第２実施例と異なる。
すなわち、インダクタＬ３を接続点Ｐに接続し、第４の放射電極６−３をこのインダクタＬ３に接続させると共にその先端部を放射電極５の途中部５２に近接させて、容量Ｃ３を形成した。これにより、放射電極４と、リアクタンス回路３０及びインダクタＬ３でなる第３の周波数可変回路３−３と、放射電極６−３と、放射電極５とで、第３のアンテナ部Ａ３を構成した。
以下、同様にして、インダクタＬｎを接続点Ｐに接続し、第ｎ＋１の放射電極６−ｎをこのインダクタＬｎに接続させると共にその先端部を放射電極５の途中部５２に近接させて、容量Ｃｎを形成した。これにより、放射電極４と、リアクタンス回路３０及びインダクタＬｎでなる第ｎの周波数可変回路３−ｎと、放射電極６−ｎと、放射電極５とで、第ｎのアンテナ部Ａｎを構成した。
かかる構成により、この実施例のアンテナ１−３では、最大ｎ数の多共振化を図ることができる。
その他の構成、作用及び効果は、上記第１及び第２実施例と同様であるので、その記載は省略する。Next explained is the third embodiment of the invention.
FIG. 6 is a schematic plan view showing an antenna according to the third embodiment of the present invention.
As shown in FIG. 6, the antenna 1-3 of this embodiment is different from the first and second embodiments in that multiple resonance is achieved.
That is, the inductor L3 was connected to the connection point P, the fourth radiating electrode 6-3 was connected to the inductor L3, and the tip thereof was brought close to the midway part 52 of the radiating electrode 5, thereby forming the capacitor C3. Thus, the third antenna portion A3 is configured by the radiation electrode 4, the third frequency variable circuit 3-3 including the reactance circuit 30 and the inductor L3, the radiation electrode 6-3, and the radiation electrode 5.
Similarly, the inductor Ln is connected to the connection point P, the (n + 1) th radiating electrode 6-n is connected to the inductor Ln, and the tip thereof is brought close to the midway part 52 of the radiating electrode 5, so that the capacitance Cn Formed. As a result, the nth antenna portion An is configured by the radiation electrode 4, the nth frequency variable circuit 3-n including the reactance circuit 30 and the inductor Ln, the radiation electrode 6-n, and the radiation electrode 5.
With this configuration, the antenna 1-3 according to this embodiment can achieve a maximum of n resonances.
Other configurations, operations, and effects are the same as those in the first and second embodiments, and thus description thereof is omitted.

次に、この発明の第４実施例について説明する。
図７は、この発明の第４実施例に係るアンテナを示す概略平面図である。
図７に示すように、この実施例のアンテナ１−４では、放射電極５を容量結合した。
具体的には、放射電極５の開放状態の先端部５１と基端部５０とを近接させて、これら先端部５１と基端部５０との間隙Ｇ１を小さくし、容量Ｃ１を発生させて、先端部５１と基端部５０とを容量結合した。Next explained is the fourth embodiment of the invention.
FIG. 7 is a schematic plan view showing an antenna according to the fourth embodiment of the present invention.
As shown in FIG. 7, in the antenna 1-4 of this embodiment, the radiation electrode 5 is capacitively coupled.
Specifically, the distal end portion 51 and the proximal end portion 50 in the open state of the radiation electrode 5 are brought close to each other, the gap G1 between the distal end portion 51 and the proximal end portion 50 is reduced, and the capacitance C1 is generated. The distal end portion 51 and the proximal end portion 50 were capacitively coupled.

かかる構成により、リアクタンス回路３１のインダクタＬ１のインダクタンス値を小さくして、所望の共振周波数ｆ２を得ることができる。この結果、集中定数素子であるインダクタＬ１の挿入ロスを減らすことができ、アンテナ部Ａ１のアンテナ利得の劣化を防止することができる。
その他の構成、作用及び効果は、上記第１ないし第３実施例と同様であるので、その記載は省略する。With this configuration, it is possible to reduce the inductance value of the inductor L1 of the reactance circuit 31 and obtain the desired resonance frequency f2. As a result, it is possible to reduce the insertion loss of the inductor L1, which is a lumped constant element, and to prevent the antenna gain of the antenna unit A1 from deteriorating.
Since other configurations, operations, and effects are the same as those in the first to third embodiments, description thereof is omitted.

次に、この発明の第５実施例について説明する。
図８は、この発明の第５実施例に係るアンテナを示す概略斜視図である。
図８に示すように、この実施例のアンテナ１−５は、アンテナ部Ａ１，Ａ２を誘電体ブロック７上に形成した。
具体的には、Ｌ字状の放射電極４を誘電体ブロック７の前面７１上に形成し、この放射電極４を、非グランド領域１０１上にパターン形成された配線パターン１１３を通じて給電部１１０に接続した。そして、集中定数素子としてのインダクタ１１１，１１２でなる整合回路を配線パターン１１３上に実装した。
また、ループ状の放射電極５と直線状の放射電極６とは、誘電体ブロック７の上面７２上に近接させて形成した。
また、放射電極４と放射電極５と放射電極６とを接続するための配線パターン１２４を誘電体ブロック７の前面７１と上面７２とに渡って形成し、リアクタンス回路３０を構成する集中定数素子であるインダクタＬ０及び可変容量ダイオードＤ０と、リアクタンス回路３１を構成する集中定数素子である可変容量ダイオードＤ１及びインダクタＬ１と、リアクタンス回路３２を構成する集中定数素子であるインダクタＬ２とを、この配線パターン１２４上に実装した。そして、配線パターン１２４上の接続点Ｐに接続される配線パターン１２５を前面７１と非グランド領域１０１とに渡って形成して、同調電圧源１２０に接続させ、集中定数素子路である高周波カット用抵抗１２１，１２３及びＤＣパスコンデンサ１２２をこの配線パターン１２５上に実装した。
さらに、配線パターン１３１を放射電極５の右角部から上面７２，前面７１及び非グランド領域１０１に渡って形成し、グランド領域１０２に接続させた。そして、集中定数素子であるインダクタ１３０をこの配線パターン１３１上に実装した。Next explained is the fifth embodiment of the invention.
FIG. 8 is a schematic perspective view showing an antenna according to a fifth embodiment of the present invention.
As shown in FIG. 8, in the antenna 1-5 of this example, the antenna portions A <b> 1 and A <b> 2 are formed on the dielectric block 7.
Specifically, the L-shaped radiation electrode 4 is formed on the front surface 71 of the dielectric block 7, and the radiation electrode 4 is connected to the power supply unit 110 through the wiring pattern 113 patterned on the non-ground region 101. did. A matching circuit including inductors 111 and 112 as lumped constant elements was mounted on the wiring pattern 113.
Further, the loop-shaped radiation electrode 5 and the linear radiation electrode 6 were formed close to the upper surface 72 of the dielectric block 7.
Further, a wiring pattern 124 for connecting the radiation electrode 4, the radiation electrode 5, and the radiation electrode 6 is formed across the front surface 71 and the upper surface 72 of the dielectric block 7, and is a lumped constant element that constitutes the reactance circuit 30. The wiring pattern 124 includes an inductor L0 and a variable capacitance diode D0, a variable capacitance diode D1 and an inductor L1 that are lumped constant elements constituting the reactance circuit 31, and an inductor L2 that is a lumped constant element constituting the reactance circuit 32. Implemented above. Then, a wiring pattern 125 connected to the connection point P on the wiring pattern 124 is formed across the front surface 71 and the non-ground region 101, and is connected to the tuning voltage source 120 for high-frequency cut that is a lumped constant element path. Resistors 121 and 123 and a DC pass capacitor 122 are mounted on the wiring pattern 125.
Further, the wiring pattern 131 was formed from the right corner of the radiation electrode 5 to the upper surface 72, the front surface 71, and the non-ground region 101 and connected to the ground region 102. An inductor 130, which is a lumped element, is mounted on the wiring pattern 131.

かかる構成により、誘電体ブロック７の誘電率を変化させることで、放射電極６の先端部と放射電極５の途中部との間の容量Ｃ２の値や、放射電極５の先端部，基端部間の容量Ｃ１の値を任意に変化させることができる。また、アンテナ１−５を上記アンテナ１−１〜１−４に比べてさらに小型にすることができる。
その他の構成、作用及び効果は、上記第１ないし第４実施例と同様であるので、その記載は省略する。With this configuration, by changing the dielectric constant of the dielectric block 7, the value of the capacitance C2 between the distal end portion of the radiation electrode 6 and the middle portion of the radiation electrode 5, the distal end portion, and the proximal end portion of the radiation electrode 5 can be obtained. The value of the capacitance C1 in between can be arbitrarily changed. Further, the antenna 1-5 can be further reduced in size as compared with the antennas 1-1 to 1-4.
Other configurations, operations, and effects are the same as those in the first to fourth embodiments, and thus description thereof is omitted.

Claims (6)

そのリアクタンス値を変化させることで第１の共振周波数を変化させることができる第１の周波数可変回路を有した第１のアンテナ部と、そのリアクタンス値を変化させることで第２の共振周波数を変化させることができる第２の周波数可変回路を有した第２のアンテナ部とを備えるアンテナであって、
上記第１のアンテナ部を、基端部が給電部に接続された第１の放射電極と、一方端がこの第１の放射電極の先端部に接続された上記第１の周波数可変回路と、基端部がこの第１の周波数可変回路の他方端に接続され且つ開放状態の先端部が上記基端部側に廻り込んで隣り合うループ状の第２の放射電極とで構成し、
上記第２のアンテナ部を、上記第１の放射電極と、一方端がこの第１の放射電極の先端部に接続された上記第２の周波数可変回路と、基端部がこの第２の周波数可変回路の他方端に接続され、且つ開放状態の先端部が上記第２の放射電極の途中部に近接して当該途中部に容量結合した第３の放射電極と、当該第２の放射電極とで構成した、
ことを特徴とするアンテナ。A first antenna unit having a first frequency variable circuit that can change the first resonance frequency by changing the reactance value, and a second resonance frequency by changing the reactance value. An antenna comprising a second antenna unit having a second frequency variable circuit that can be
The first antenna unit includes a first radiating electrode having a base end connected to the power feeding unit, and the first frequency variable circuit having one end connected to the tip of the first radiating electrode, A base end portion is connected to the other end of the first frequency variable circuit, and an open front end portion wraps around the base end portion side to form an adjacent loop-shaped second radiation electrode,
The second antenna unit includes the first radiating electrode, the second frequency variable circuit having one end connected to the tip of the first radiating electrode, and a base end having the second frequency. A third radiating electrode connected to the other end of the variable circuit and having an open end portion close to the middle portion of the second radiation electrode and capacitively coupled to the middle portion; and the second radiation electrode; Configured with
An antenna characterized by that. 上記第１の放射電極と、一方端がこの第１の放射電極の先端部に接続され且つそのリアクタンス値を変化させることで第ｎ（ｎ＝３以上の整数）の共振周波数を変化させることができる第ｎの周波数可変回路と、基端部がこの第ｎの周波数可変回路の他方端に接続され、且つ開放状態の先端部が上記第２の放射電極の途中部に近接して当該途中部に容量結合した第ｎ＋１の放射電極と、当該第２の放射電極とで構成される第ｎのアンテナ部を追加した、
ことを特徴とする請求項１に記載のアンテナ。The first radiating electrode and one end of which is connected to the tip of the first radiating electrode, and the reactance value is changed to change the nth (n = an integer of 3 or more) resonance frequency. An n-th frequency variable circuit, a base end portion of which is connected to the other end of the n-th frequency variable circuit, and an open distal end portion is close to the mid-section of the second radiation electrode and the mid-section An n-th antenna unit composed of the (n + 1) -th radiation electrode capacitively coupled to the second radiation electrode and the second radiation electrode is added.
The antenna according to claim 1. 上記第２の放射電極の開放状態の先端部と上記基端部側とを近接させて容量結合させた、
ことを特徴とする請求項１又は請求項２に記載のアンテナ。The distal end portion of the second radiation electrode in the open state and the proximal end portion side are brought close to each other and capacitively coupled.
The antenna according to claim 1 or 2, characterized by the above. 上記第１のアンテナ部ないし第ｎのアンテナ部のいずれか又は全てを誘電体ブロック上に形成した、
ことを特徴とする請求項１ないし請求項３のいずれかに記載のアンテナ。Any or all of the first to nth antenna portions are formed on a dielectric block.
The antenna according to any one of claims 1 to 3, wherein the antenna is provided. 上記第１の周波数可変回路ないし第ｎの周波数可変回路は、その容量値を制御電圧で変化可能な可変容量ダイオードを含む、
ことを特徴とする請求項１ないし請求項４のいずれかに記載のアンテナ。The first frequency variable circuit to the nth frequency variable circuit include a variable capacitance diode whose capacitance value can be changed by a control voltage.
The antenna according to any one of claims 1 to 4, wherein the antenna is provided. 請求項１ないし請求項５のいずれかに記載のアンテナを具備する、
ことを特徴とする無線通信機。Comprising the antenna according to any one of claims 1 to 5,
A wireless communication device.
JP2010504973A 2008-08-05 2009-04-01 Antenna and wireless communication device Active JP5051296B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010504973A JP5051296B2 (en) 2008-08-05 2009-04-01 Antenna and wireless communication device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2008201895 2008-08-05
JP2008201895 2008-08-05
JP2010504973A JP5051296B2 (en) 2008-08-05 2009-04-01 Antenna and wireless communication device
PCT/JP2009/056791 WO2010016298A1 (en) 2008-08-05 2009-04-01 Antenna and wireless communication machine

Publications (2)

Publication Number Publication Date
JPWO2010016298A1 JPWO2010016298A1 (en) 2012-01-19
JP5051296B2 true JP5051296B2 (en) 2012-10-17

Family

ID=41663524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2010504973A Active JP5051296B2 (en) 2008-08-05 2009-04-01 Antenna and wireless communication device

Country Status (4)

Country Link
JP (1) JP5051296B2 (en)
CN (1) CN102144334B (en)
DE (1) DE112009001935B4 (en)
WO (1) WO2010016298A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101470117B1 (en) * 2013-01-25 2014-12-05 엘지이노텍 주식회사 Antenna apparatus
KR20160126588A (en) * 2015-04-24 2016-11-02 엘지이노텍 주식회사 Antenna module
KR102301421B1 (en) * 2020-04-29 2021-09-14 주식회사 갤트로닉스 코리아 Hybrid antenna for mobile communicative devices

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012044254A (en) * 2010-08-12 2012-03-01 Central Glass Co Ltd Vehicle antenna
JP5645121B2 (en) * 2010-12-28 2014-12-24 三菱マテリアル株式会社 Antenna device substrate and antenna device
CN102809752B (en) * 2011-05-31 2015-05-27 深圳光启高等理工研究院 Navigation unit
CN102810732B (en) * 2011-05-31 2016-08-03 深圳光启创新技术有限公司 A kind of antenna and there is the mimo antenna of this antenna
US9240627B2 (en) * 2011-10-20 2016-01-19 Htc Corporation Handheld device and planar antenna thereof
US8988306B2 (en) * 2011-11-11 2015-03-24 Htc Corporation Multi-feed antenna
KR101360534B1 (en) * 2012-04-27 2014-02-12 한양대학교 산학협력단 Antenna
JP2014146851A (en) * 2013-01-25 2014-08-14 Panasonic Corp Antenna device and portable terminal including the antenna device
CN103928761B (en) * 2014-04-01 2018-02-02 刘扬 A kind of broad-band antenna using resonant feed structure
CN106505299B (en) * 2015-09-04 2020-11-17 Ａｇｃ株式会社 Antenna with a shield
CN207800911U (en) * 2016-11-29 2018-08-31 株式会社村田制作所 Antenna assembly and electronic equipment
CN109360005B (en) * 2018-10-12 2021-07-27 苏州晟达力芯电子科技有限公司 Radio frequency chip, electronic tag and identification method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6642895B2 (en) * 2000-03-15 2003-11-04 Asulab S.A. Multifrequency antenna for instrument with small volume
FR2849288A1 (en) * 2002-12-23 2004-06-25 Socapex Amphenol Broadband antenna for mobile radio telephone, has two conductive surfaces lying in same geometrical surface of non-closed curvilinear shape, where one surface has metallization that is coupled to ground of transceiver module
WO2004109850A1 (en) * 2003-06-04 2004-12-16 Murata Manufacturing Co. Ltd. Frequency-variable antenna and communication device having the same
JP2006060384A (en) 2004-08-18 2006-03-02 Murata Mfg Co Ltd Variable frequency type antenna and wireless communication device
CN101111972B (en) * 2005-01-27 2015-03-11 株式会社村田制作所 Antenna and wireless communication device
JP4632176B2 (en) 2006-01-20 2011-02-16 株式会社村田製作所 Antenna and wireless communication device
ATE534165T1 (en) * 2006-07-13 2011-12-15 Murata Manufacturing Co WIRELESS COMMUNICATION DEVICE
JP4775771B2 (en) * 2006-07-28 2011-09-21 株式会社村田製作所 ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE
EP2104178A4 (en) * 2007-01-19 2014-05-28 Murata Manufacturing Co Antenna unit and wireless communication apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101470117B1 (en) * 2013-01-25 2014-12-05 엘지이노텍 주식회사 Antenna apparatus
KR20160126588A (en) * 2015-04-24 2016-11-02 엘지이노텍 주식회사 Antenna module
KR102288148B1 (en) 2015-04-24 2021-08-10 엘지이노텍 주식회사 Antenna module
KR102301421B1 (en) * 2020-04-29 2021-09-14 주식회사 갤트로닉스 코리아 Hybrid antenna for mobile communicative devices

Also Published As

Publication number Publication date
DE112009001935T5 (en) 2012-02-02
CN102144334A (en) 2011-08-03
CN102144334B (en) 2014-02-19
DE112009001935B4 (en) 2013-06-27
JPWO2010016298A1 (en) 2012-01-19
WO2010016298A1 (en) 2010-02-11

Similar Documents

Publication Publication Date Title
JP5051296B2 (en) Antenna and wireless communication device
JP4508190B2 (en) Antenna and wireless communication device
JP4389275B2 (en) ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE
JP4632176B2 (en) Antenna and wireless communication device
KR101122851B1 (en) Broadcast reception terminal apparatus
JP4775771B2 (en) ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE
JP5131481B2 (en) ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE
WO2015182677A1 (en) Multiple antenna and wireless device provided with same
US8421702B2 (en) Multi-layer reactively loaded isolated magnetic dipole antenna
JPH10284919A (en) Antenna system
US8648763B2 (en) Ground radiator using capacitor
JP2009111999A (en) Multiband antenna
JP5105208B2 (en) ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE
JPH1127026A (en) Antenna device
TWI814085B (en) Antenna structure and wireless communication device with such antenna structure
JPH1127025A (en) Antenna device
US11367963B2 (en) Antenna device
JP2009194864A (en) Antenna apparatus
JP5305255B2 (en) ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE
JP3972820B2 (en) Antenna unit, broadcast receiving terminal device
JP3156407U (en) Antenna and wireless IC device
JP2009296483A (en) Antenna device

Legal Events

Date Code Title Description
TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120626

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120709

R150 Certificate of patent or registration of utility model

Ref document number: 5051296

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150803

Year of fee payment: 3