JP2004274934A

JP2004274934A - Mobile telephone

Info

Publication number: JP2004274934A
Application number: JP2003064838A
Authority: JP
Inventors: Tsuneo Otsuka; 庸夫大塚
Original assignee: NEC Saitama Ltd
Current assignee: NEC Saitama Ltd
Priority date: 2003-03-11
Filing date: 2003-03-11
Publication date: 2004-09-30

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile telephone capable of reducing layout of power cables between a first box body portion and a second box body portion, optimizing the conditions for reduction in size and thickness, and eliminating need for a power supply circuit in the second box body portion. <P>SOLUTION: This mobile telephone generates a transmit wave, superimposes DC voltage on the transmission wave to be a DC superimposed transmission wave and to be outputted by the first box body portion 1, and transmits the DC superimposed transmission wave outputted by the first box body portion 1 through a coaxial cable 3. The second box body portion 2 receives the DC superimposed transmission wave through the coaxial cable 3, takes out the DC voltage from the DC superimposed transmission wave, uses the DC voltage as voltage for a circuit preset in the second box body portion 2, and takes out the transmission wave from the DC superimposed transmission wave to send the transmit wave out to an antenna 4. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は携帯電話機に関し、特に分割された筐体を有する携帯電話機に関する。
【０００２】
【従来の技術】
従来、この種の携帯電話機は、図６で示すように、送信電波を生成して出力する第１筐体部７と、第１筐体部７が出力した送信電波を伝達する同軸ケーブル３と、この同軸ケーブル３を介して送信電波を受けこの送信電波をアンテナ４に送り出す第２筐体部８と、この送信電波を放射するアンテナ４とにより構成する。そして、第１筐体部７は予め電源回路７２を有し、第１筐体部７に予め備えられた携帯電話機用の第１の各種回路７１にこの電源回路７２から電圧を供給する。また、この電源回路７２から第２筐体部８へ電源ケーブル９を引きこの電源ケーブル９を介して第２筐体部８の第２の各種回路８１へこの電源回路７２から電圧を供給している。
【０００３】
また、電源回路を第１筐体部と第２筐体部とに備え、それぞれの筐体部に予め備えられた携帯電話機用の各種回路にこれらの電源回路からそれぞれ電圧を供給しているものもある（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開２００１−２２３７７４号公報（請求項１、図１）
【０００５】
【発明が解決しようとする課題】
上述した図６の従来の携帯電話機は、電源回路を第１筐体部に備え、この電源回路から第２筐体部へ電源ケーブルを引きこの電源ケーブルを介して第２筐体部の第２の各種回路へこの電源回路から電圧を供給している。このため、第１筐体部と第２筐体部との間に電源ケーブルを敷設する必要があるので、この敷設した電源ケーブル分重くなり、小型化や薄型化するために不利となるという問題がある。
【０００６】
また、上述した特許文献１に記載の従来の携帯電話機は、電源回路を第１筐体部と第２筐体部とに備え、それぞれの筐体部に予め備えられた携帯電話機用の各種回路にこれらの電源回路からそれぞれ電圧を供給している。このため、第２筐体部以外に第２筐体部にも電源回路が必要であるので、第２筐体部の電源回路分部品点数が多くなるという問題がある。
【０００７】
本発明の目的はこのような従来の欠点を除去するため、第１筐体部と第２筐体部との間に電源ケーブルの敷設を少なくし、従ってこの少なくなった電源ケーブル分軽くなり、小型化や薄型化するために有利な携帯電話機を提供することにある。
【０００８】
また、第２筐体部に電源回路を設ける必要がなく、第２筐体部の電源回路分部品点数が少なくなる携帯電話機を提供することにある。
【０００９】
【課題を解決するための手段】
本発明の携帯電話機は、送信電波を生成しアンテナよりこの送信電波を放射する携帯電話機において、
前記送信電波を生成しこの送信電波に直流電圧を重畳して直流重畳送信電波としこの直流重畳送信電波を出力する第１筐体部と、
前記第１筐体部が出力した前記直流重畳送信電波を伝達する同軸ケーブルと、前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を自第２筐体部に予め備えた回路の作動用の電圧として使用するとともに、前記直流重畳送信電波より前記送信電波を取り出しこの送信電波を前記アンテナに送り出す第２筐体部と、
を備えて構成されている。
【００１０】
また、本発明の携帯電話機の前記予め備えた回路は、前記アンテナの伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに前記送信電波を前記アンテナに送り出すアンテナマッチング回路である。
【００１１】
更に、本発明の携帯電話機の前記アンテナマッチング回路は、前記直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を作動用の電圧として使用するようにしている。
【００１２】
また、本発明の携帯電話機の前記アンテナマッチング回路は、前記直流重畳送信電波より前記送信電波を取り出しこの送信電波を前記アンテナに送り出すようにしている。
【００１３】
更に、本発明の携帯電話機の前記予め備えた回路は、表示や通信をする赤外線回路、表示をするＬＣＤ回路を含む各種回路である。
【００１４】
また、本発明の携帯電話機の前記各種回路は、前記直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を作動用の電圧として使用するようにしている。
【００１５】
更に、本発明の携帯電話機の前記第１筐体部は、
自第１筐体部内で発生する送信信号を変調して前記送信電波を出力する送信回路と、
前記直流電圧を発生する直流電圧発生回路と、
前記送信回路が出力した前記送信電波に前記直流電圧発生回路が発生した前記直流電圧を重畳して前記直流重畳送信電波を生成しこの直流重畳送信電波を出力する重畳回路と、
を備えて構成されている。
【００１６】
また、本発明の携帯電話機の前記第１筐体部は、
自第１筐体部内で発生する送信信号を変調して前記送信電波を出力する送信回路と、
直流電圧を発生する直流電圧発生回路と、
前記直流電圧発生回路が発生した前記直流電圧を受けこの直流電圧を作動用の電圧として、前記送信回路が出力した前記送信電波を増幅する増幅回路と、
前記増幅回路が増幅した前記送信電波に前記直流電圧発生回路が発生した前記直流電圧を重畳して前記直流重畳送信電波を生成しこの直流重畳送信電波を出力する重畳回路と、
を備えて構成されている。
【００１７】
更に、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を作動用の電圧として使用して、前記アンテナの伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに、前記直流重畳送信電波より前記送信電波を取り出しこの送信電波を前記アンテナに送り出すアンテナマッチング回路を備えている。
【００１８】
また、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記送信電波と前記直流電圧とを分離してそれぞれ出力する分離回路と、
前記分離回路が分離した前記直流電圧を受けこの直流電圧を作動用の電圧として使用して、前記アンテナの伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに前記分離回路が分離した前記送信電波を受けこの送信電波を前記アンテナに送り出すアンテナマッチング回路と、
を備えて構成されている。
【００１９】
更に、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を出力する分離回路と、
前記分離回路が取り出した前記直流電圧を受けこの直流電圧を作動用の電圧として使用して、前記アンテナの伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに、前記直流重畳送信電波を受けこの直流重畳送信電波より前記送信電波を取り出しこの送信電波を前記アンテナに送り出すアンテナマッチング回路と、
を備えて構成されている。
【００２０】
また、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記送信電波を取り出しこの送信電波を出力する分離回路と、
前記直流重畳送信電波を受けこの直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を作動用の電圧として使用して、前記アンテナの伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに、前記分離回路が取り出した前記送信電波を受けこの送信電波を前記アンテナに送り出すアンテナマッチング回路と、
を備えて構成されている。
【００２１】
更に、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を作動用の電圧として使用して、表示や通信をする赤外線回路、表示をするＬＣＤ回路を含む各種回路と、
前記直流重畳送信電波より前記送信電波を取り出しこの送信電波を前記アンテナに送り出すアンテナマッチング回路と、
を備えて構成されている。
【００２２】
また、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記送信電波と前記直流電圧とを分離してそれぞれ出力する分離回路と、
前記分離回路が分離した前記直流電圧を受けこの直流電圧を作動用の電圧として使用して、表示や通信をする赤外線回路、表示をするＬＣＤ回路を含む各種回路と、
前記分離回路が分離した前記送信電波を受けこの送信電波を前記アンテナに送り出すアンテナマッチング回路と、
を備えて構成されている。
【００２３】
更に、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を出力する分離回路と、
前記分離回路が取り出した前記直流電圧を受けこの直流電圧を作動用の電圧として使用して、表示や通信をする赤外線回路、表示をするＬＣＤ回路を含む各種回路と、
前記直流重畳送信電波を受けこの直流重畳送信電波より前記送信電波を取り出しこの送信電波を前記アンテナに送り出すアンテナマッチング回路と、
を備えて構成されている。
【００２４】
また、本発明の携帯電話機の前記第２筐体部は、
前記同軸ケーブルを介して前記直流重畳送信電波を受けこの直流重畳送信電波より前記送信電波を取り出しこの送信電波を出力する分離回路と、
前記直流重畳送信電波を受けこの直流重畳送信電波より前記直流電圧を取り出しこの直流電圧を作動用の電圧として使用して、表示や通信をする赤外線回路、表示をするＬＣＤ回路を含む各種回路と、
前記分離回路が分離した前記送信電波を受けこの送信電波を前記アンテナに送り出すアンテナマッチング回路と、
を備えて構成されている。
【００２５】
【発明の実施の形態】
次に、本発明の実施の形態について図面を参照して説明する。
【００２６】
図１は、本発明の携帯電話機の第１の実施の形態を示すブロック図である。
【００２７】
図１に示す本実施の形態は、送信電波を生成して出力する第１筐体部１と、第１筐体部１が出力した送信電波を伝達する同軸ケーブル３と、この同軸ケーブル３を介して送信電波を受けこの送信電波をアンテナ４に送り出す第２筐体部２と、この送信電波を放射するアンテナ４とにより構成する。
【００２８】
第１筐体部１は、例えば、操作キー等の操作部を含む携帯電話機の下側の筐体部分を示す。
【００２９】
第２筐体部２は、例えば、表示や通信をする赤外線回路、表示をするＬＣＤ回路を含む携帯電話機の上側の筐体部分を示す。
【００３０】
第１筐体部１は、第１筐体部１内で発生する送信するためのデータを含む送信信号を受け送信電波を生成する送信回路１２と、例えば負の直流電圧（以後、負電圧と記載する。）を発生する負電圧発生回路１１と、負電圧発生回路１１が発生した負電圧を作動用の電圧として使用し、送信回路１２が生成した送信電波を増幅する増幅回路１３と、増幅回路１３が増幅した送信電波と負電圧発生回路１１が発生した負電圧を重畳して直流重畳送信電波としこの直流重畳送信電波を出力する重畳回路１４とにより構成する。
【００３１】
同軸ケーブル３は重畳回路１４が出力した直流重畳送信電波を伝達する。
【００３２】
第２筐体部２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波を負電圧と送信電波とに分離してそれぞれ出力する分離回路２２と、分離回路２２が出力した負電圧を作動用の電圧として使用して、アンテナ４の伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに分離回路２２が出力した送信電波をアンテナ４に送り出すアンテナ４マッチング回路とにより構成する。
【００３３】
次に、本実施の形態の携帯電話機の動作を図２及び図３を参照して詳細に説明する。
【００３４】
図２は、増幅回路が増幅した送信電波の波形の一例を示す図である。
【００３５】
図３は、直流重畳送信電波の波形の一例を示す図である。
【００３６】
図１において、送信回路１２は、第１筐体部１内で発生する送信するためのデータを含む送信信号を受けこの送信信号を例えばＱＰＳＫ変調して送信電波を生成する。
【００３７】
送信電波の波形は例えば高周波のＳＩＮ波にＱＰＳＫの変調がかかった波形となる。
【００３８】
負電圧発生回路１１は、予め定めた大きさ（例えば、−５ｖから−０．５ｖのうちの予め定めた電圧値、−２．５ｖ。この値にこだわることなく、システムにより適宜変更可能である。）の負電圧を発生する。
【００３９】
増幅回路１３は、負電圧発生回路１１が発生した負電圧を作動用の電圧として使用し、送信回路１２が生成した送信電波を増幅する。増幅結果を図２に示す。
【００４０】
重畳回路１４は、増幅回路１３が増幅した送信電波と負電圧発生回路１１が発生した負電圧を重畳して図３に示す直流重畳送信電波を生成しこの直流重畳送信電波を出力する。
【００４１】
同軸ケーブル３は重畳回路１４が出力した直流重畳送信電波を伝達する。
【００４２】
分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波を負電圧と送信電波とに分離してそれぞれ出力する。
【００４３】
アンテナマッチング回路２１は、分離回路２２が出力した負電圧を作動用の電圧として使用して、アンテナ４の伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに分離回路２２が出力した送信電波をアンテナ４に送り出す。
【００４４】
アンテナ４は、この送信電波を放射する。
【００４５】
以上の説明では、分離回路２２により、同軸ケーブル３を介して受けた直流重畳送信電波を負電圧と送信電波とに分離してそれぞれ出力し、アンテナマッチング回路２１は、分離回路２２より負電圧と送信電波とを受け、この受けた負電圧を作動用の電圧として使用して、アンテナ４の伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに分離回路２２より受けた送信電波をアンテナ４に送り出すようにしたが、分離回路２２での直流重畳送信電波の分離機能をアンテナマッチング回路２１に持たせ、次のようにしても良い。
【００４６】
すなわち、分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波を出力し、アンテナマッチング回路２１は、分離回路２２より直流重畳送信電波を受けこの直流重畳送信電波より負電圧を取り出しこの負電圧を作動用の電圧として使用してアンテナ４の伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに、分離回路２２より受けた直流重畳送信電波より送信電波を取り出しこの送信電波をアンテナ４に送り出すようにしても良い。
【００４７】
また、分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波より負電圧を取り出しこの負電圧と直流重畳送信電波とを出力し、アンテナマッチング回路２１は、分離回路２２より負電圧を受けこの負電圧を作動用の電圧として使用してアンテナ４の伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに、分離回路２２より受けた直流重畳送信電波より送信電波を取り出しこの送信電波をアンテナ４に送り出すようにしても良い。
【００４８】
更に、分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波より送信電波を取り出しこの送信電波と直流重畳送信電波とを出力し、アンテナマッチング回路２１は、分離回路２２より直流重畳送信電波を受けこの直流重畳送信電波より負電圧を取り出しこの負電圧を作動用の電圧として使用してアンテナ４の伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに、分離回路２２より送信電波を受けこの送信電波をアンテナ４に送り出すようにしても良い。
【００４９】
図４は、本発明の携帯電話機の第２の実施の形態を示すブロック図である。
【００５０】
図４に示す本実施の形態は、送信電波を生成して出力する第１筐体部５と、第１筐体部５が出力した送信電波を伝達する同軸ケーブル３と、この同軸ケーブル３を介して送信電波を受けこの送信電波をアンテナ４に送り出す第２筐体部６と、この送信電波を放射するアンテナ４とにより構成する。
【００５１】
第１筐体部５は、例えば、操作キー等の操作部を含む携帯電話機の下側の筐体部分を示す。
【００５２】
第２筐体部６は、例えば、表示や通信をする赤外線回路、表示をするＬＣＤ回路を含む携帯電話機の上側の筐体部分を示す。
【００５３】
第１筐体部５は、第１筐体部５内で発生する送信するためのデータを含む送信信号を受け送信電波を生成する送信回路１２と、例えば負電圧を発生する負電圧発生回路１１と、負電圧発生回路１１が発生した負電圧を作動用の電圧として使用し、送信回路１２が生成した送信電波を増幅する増幅回路１３と、直流電圧を発生する電源回路５１（例えば正の直流電圧（以後、正電圧と記載する。この電圧は、例えば、０．５ｖから５ｖのうちの予め定めた電圧値、２．８ｖ。この値にこだわることなく、システムにより適宜変更可能である。）を発生する）と、増幅回路１３が増幅した送信電波と電源回路５１が発生した正電圧を重畳して直流重畳送信電波としこの直流重畳送信電波を出力する重畳回路１４とにより構成する。
【００５４】
同軸ケーブル３は重畳回路１４が出力した直流重畳送信電波を伝達する。
【００５５】
第２筐体部６は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波を正電圧と送信電波とに分離してそれぞれ出力する分離回路２２と、分離回路２２が出力した正電圧を作動用の電圧として使用して、赤外線ランプを制御し表示や通信を行う赤外線回路やＬＣＤを制御して表示を行うＬＣＤ回路を含む各種回路６１と、分離回路２２が出力した送信電波をアンテナ４に送り出すアンテナマッチング回路２１とにより構成する。
【００５６】
次に、本実施の形態の携帯電話機の動作を図２及び図５を参照して詳細に説明する。
【００５７】
図５は、直流重畳送信電波の波形の一例を示す図である。
【００５８】
図４において、送信回路１２と負電圧発生回路１１と増幅回路１３とは第１の実施の形態で示したものと同じである。
【００５９】
重畳回路１４は、増幅回路１３が増幅した送信電波と電源回路５１が発生した正電圧を重畳して図５に示す直流重畳送信電波を生成しこの直流重畳送信電波を出力する。
【００６０】
同軸ケーブル３は重畳回路１４が出力した直流重畳送信電波を伝達する。
【００６１】
分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波を正電圧と送信電波とに分離してそれぞれ出力する。
【００６２】
赤外線回路やＬＣＤ回路を含む各種回路６１は、分離回路２２が出力した正電圧を作動用の電圧として使用してそれぞれの動作を行う。赤外線回路は、赤外線ランプ等を制御し表示や通信を行う。ＬＣＤ回路は、ＬＣＤ等を制御して表示を行う。
【００６３】
アンテナマッチング回路２１は、例えば第１筐体部５の負電圧発生回路１１から電源ケーブル（不図示）を介して負電圧を受けこの負電圧を作動用の電圧として使用してアンテナ４の伸張状態と収納状態とを検出しそれぞれの状態に整合したインピーダンスに切り換えるとともに、分離回路２２より送信電波を受けこの送信電波をアンテナ４に送り出す。
【００６４】
アンテナ４は、この送信電波を放射する。
【００６５】
以上の説明では、分離回路２２により、同軸ケーブル３を介して受けた直流重畳送信電波を正電圧と送信電波とに分離してそれぞれ出力し、各種回路６１は、分離回路２２より正電圧を受けこの正電圧を作動用の電圧として使用してそれぞれの動作を行い、アンテナマッチング回路２１は、分離回路２２より送信電波を受けこの送信電波をアンテナ４に送り出すようにしたが、分離回路２２での直流重畳送信電波の分離機能を各種回路６１とアンテナマッチング回路２１に持たせ、次のようにしても良い。
【００６６】
すなわち、分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波を出力し、各種回路６１は、分離回路２２より直流重畳送信電波を受けこの直流重畳送信電波より正電圧を取り出しこの正電圧を作動用の電圧として使用してそれぞれの動作を行い、アンテナマッチング回路２１は、分離回路２２より直流重畳送信電波を受けこの直流重畳送信電波より送信電波を取り出しこの送信電波をアンテナ４に送り出すようにしても良い。
【００６７】
また、分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波より正電圧を取り出しこの正電圧と直流重畳送信電波とを出力し、各種回路６１は、分離回路２２より正電圧を受けこの正電圧を作動用の電圧として使用してそれぞれの動作を行い、アンテナマッチング回路２１は、分離回路２２より直流重畳送信電波を受けこの直流重畳送信電波より送信電波を取り出しこの送信電波をアンテナ４に送り出すようにしても良い。
【００６８】
更に、分離回路２２は、同軸ケーブル３を介して直流重畳送信電波を受けこの直流重畳送信電波より送信電波を取り出しこの送信電波と直流重畳送信電波とを出力し、各種回路６１は、分離回路２２より直流重畳送信電波を受けこの直流重畳送信電波より正電圧を取り出しこの正電圧を作動用の電圧として使用してそれぞれの動作を行い、アンテナマッチング回路２１は、分離回路２２より送信電波を受けこの送信電波をアンテナ４に送り出すようにしても良い。
【００６９】
【発明の効果】
以上説明したように、本発明の携帯電話機によれば、第１筐体部により、送信電波に直流電圧を重畳して直流重畳送信電波とし、送信電波を伝達するための同軸ケーブルによりこの直流重畳送信電波を第２筐体部に伝達し、第２筐体部でこの直流重畳送信電波より直流電圧を取り出しこの直流電圧を第２筐体部に予め備えた回路の作動用の電圧として使用するため、第２筐体部に予め備えた回路の作動用の電圧を同軸ケーブルを介して第１筐体部から第２筐体部へ伝送するので、第２筐体部に予め備えた回路の作動用の電圧の伝送用の電源ケーブルの敷設をせずに第２筐体部に予め備えた回路の作動用の電圧を第１筐体部から第２筐体部に伝送できる。
【００７０】
従って、第２筐体部に予め備えた回路の作動用の電圧の伝送用の電源ケーブル分電源ケーブルが少なくなり、この少なくなった電源ケーブル分軽くなる。このため、小型化や薄型化するために有利な携帯電話機が提供できる。
【００７１】
また、第２筐体部に電源回路を設ける必要がなく、第２筐体部の電源回路分部品点数が少なくなる。
【図面の簡単な説明】
【図１】本発明の携帯電話機の第１の実施の形態を示すブロック図である。
【図２】増幅回路が増幅した送信電波の波形の一例を示す図である。
【図３】直流重畳送信電波の波形の一例を示す図である。
【図４】本発明の携帯電話機の第２の実施の形態を示すブロック図である。
【図５】直流重畳送信電波の波形の一例を示す図である。
【図６】従来の携帯電話機を示すブロック図である。
【符号の説明】
１第１筐体部
２第２筐体部
３同軸ケーブル
４アンテナ
５第１筐体部
６第２筐体部
７第１筐体部
８第２筐体部
９電源ケーブル
１１負電圧発生回路
１２送信回路
１３増幅回路
１４重畳回路
２１アンテナマッチング回路
２２分離回路
５１電源回路
６１各種回路
７１第１の各種回路
７２電源回路
８１第２の各種回路[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile phone, and more particularly, to a mobile phone having a divided housing.
[0002]
[Prior art]
Conventionally, as shown in FIG. 6, a mobile phone of this type includes a first housing 7 for generating and outputting a transmission radio wave, and a coaxial cable 3 for transmitting the transmission radio wave output from the first housing 7. The second housing 8 receives a transmission radio wave via the coaxial cable 3 and sends the transmission radio wave to the antenna 4, and the antenna 4 radiates the transmission radio wave. The first housing 7 has a power supply circuit 72 in advance, and supplies a voltage from the power supply circuit 72 to the first various circuits 71 for mobile phones provided in the first housing 7 in advance. Further, the power supply circuit 9 pulls the power supply cable 9 from the power supply circuit 72 to the second housing section 8, and supplies a voltage from the power supply circuit 72 to the second various circuits 81 of the second housing section 8 via the power supply cable 9. I have.
[0003]
In addition, a power supply circuit is provided in the first housing portion and the second housing portion, and voltages are supplied from these power supply circuits to various circuits for mobile phones provided in the respective housing portions in advance. (For example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2001-223774 A (Claim 1, FIG. 1)
[0005]
[Problems to be solved by the invention]
The above-described conventional mobile phone shown in FIG. 6 includes a power supply circuit in the first housing, pulls a power cable from the power supply circuit to the second housing, and connects the second power supply to the second housing through the power supply cable. Are supplied from this power supply circuit to various circuits. For this reason, it is necessary to lay a power cable between the first housing part and the second housing part, and the weight of the laid power cable becomes heavy, which is disadvantageous for downsizing and thinning. There is.
[0006]
Further, the conventional mobile phone described in Patent Document 1 described above has a power supply circuit provided in a first housing portion and a second housing portion, and various circuits for the mobile phone provided in each housing portion in advance. Are supplied with voltages from these power supply circuits. For this reason, since a power supply circuit is required in the second housing part in addition to the second housing part, there is a problem that the number of parts is increased by the power supply circuit of the second housing part.
[0007]
An object of the present invention is to reduce the laying of the power cable between the first housing part and the second housing part in order to eliminate such a conventional drawback, and therefore, the weight of the reduced power cable is reduced. It is an object of the present invention to provide a mobile phone which is advantageous for miniaturization and thinning.
[0008]
It is another object of the present invention to provide a mobile phone in which the power supply circuit does not need to be provided in the second housing portion and the number of components is reduced for the power supply circuit in the second housing portion.
[0009]
[Means for Solving the Problems]
The mobile phone of the present invention is a mobile phone that generates a transmission radio wave and radiates the transmission radio wave from an antenna.
A first housing unit that generates the transmission radio wave, superimposes a DC voltage on the transmission radio wave to generate a DC superimposed transmission radio wave, and outputs the DC superimposed transmission radio wave;
A coaxial cable for transmitting the DC superimposed transmission radio wave output by the first housing portion; receiving the DC superimposed transmission radio wave via the coaxial cable; extracting the DC voltage from the DC superimposed transmission radio wave; A second housing portion that is used as a voltage for operating a circuit previously provided in the second housing portion, extracts the transmission radio wave from the DC superimposed transmission radio wave, and sends the transmission radio wave to the antenna;
It is configured with.
[0010]
Further, the previously provided circuit of the mobile phone of the present invention is an antenna matching circuit that detects an extended state and a stowed state of the antenna, switches the impedance to impedance matching the respective states, and sends the transmission radio wave to the antenna. .
[0011]
Further, the antenna matching circuit of the mobile phone of the present invention extracts the DC voltage from the DC superimposed transmission radio wave and uses the DC voltage as an operating voltage.
[0012]
Further, the antenna matching circuit of the mobile phone of the present invention extracts the transmission radio wave from the DC superimposed transmission radio wave and sends the transmission radio wave to the antenna.
[0013]
Further, the circuits provided in advance of the mobile phone of the present invention are various circuits including an infrared circuit for performing display and communication and an LCD circuit for performing display.
[0014]
The various circuits of the mobile phone of the present invention take out the DC voltage from the DC superimposed transmission radio wave and use the DC voltage as an operating voltage.
[0015]
Further, the first housing portion of the mobile phone of the present invention may further include:
A transmission circuit that modulates a transmission signal generated in the first housing itself and outputs the transmission radio wave;
A DC voltage generation circuit that generates the DC voltage,
A superimposition circuit that superimposes the DC voltage generated by the DC voltage generation circuit on the transmission radio wave output by the transmission circuit to generate the DC superimposed transmission radio wave and outputs the DC superimposed transmission radio wave,
It is configured with.
[0016]
Further, the first housing portion of the mobile phone of the present invention includes:
A transmission circuit that modulates a transmission signal generated in the first housing itself and outputs the transmission radio wave;
A DC voltage generating circuit for generating a DC voltage;
An amplification circuit that receives the DC voltage generated by the DC voltage generation circuit, and amplifies the transmission radio wave output by the transmission circuit, using the DC voltage as an operating voltage;
A superimposition circuit that superimposes the DC voltage generated by the DC voltage generation circuit on the transmission radio wave amplified by the amplification circuit, generates the DC superimposed transmission radio wave, and outputs the DC superimposed transmission radio wave,
It is configured with.
[0017]
Further, the second housing portion of the mobile phone according to the present invention includes:
Receiving the DC superimposed transmission radio wave via the coaxial cable, extracting the DC voltage from the DC superimposed transmission radio wave, using the DC voltage as an operating voltage, detecting the extended state and the retracted state of the antenna, respectively. And an antenna matching circuit for extracting the transmission radio wave from the DC superimposed transmission radio wave and sending out the transmission radio wave to the antenna, while switching the impedance to the impedance matching the state described in (1).
[0018]
Further, the second housing part of the mobile phone of the present invention includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, separates the transmission radio wave and the DC voltage from the DC superimposed transmission radio wave, and outputs the separated transmission radio waves and the DC voltage,
The separating circuit receives the separated DC voltage, uses the DC voltage as an operating voltage, detects the extended state and the housed state of the antenna, switches the impedance to match the respective states, and switches the impedance to the matching state. An antenna matching circuit that receives the separated transmission radio wave and sends the transmission radio wave to the antenna;
It is configured with.
[0019]
Further, the second housing portion of the mobile phone according to the present invention includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the DC voltage from the DC superimposed transmission radio wave, and outputs the DC voltage;
The separation circuit receives the DC voltage taken out, uses the DC voltage as an operating voltage, detects an extended state and a stowed state of the antenna, switches to an impedance matched to each state, and performs the DC superposition. An antenna matching circuit that receives a transmission radio wave, extracts the transmission radio wave from the DC superimposed transmission radio wave, and sends the transmission radio wave to the antenna,
It is configured with.
[0020]
Further, the second housing part of the mobile phone of the present invention includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the transmission radio wave from the DC superimposed transmission radio wave, and outputs the transmission radio wave,
Receiving the DC superimposed transmission radio wave, extracting the DC voltage from the DC superimposed transmission radio wave, using the DC voltage as an operating voltage, detecting the extended state and the retracted state of the antenna, and matching the impedance to the respective states. And an antenna matching circuit that receives the transmission radio wave extracted by the separation circuit and sends out the transmission radio wave to the antenna.
It is configured with.
[0021]
Further, the second housing portion of the mobile phone according to the present invention includes:
Receives the DC superimposed transmission radio wave via the coaxial cable, extracts the DC voltage from the DC superimposed transmission radio wave, and uses the DC voltage as an operating voltage to perform an infrared circuit for display and communication, and an LCD circuit for display. And various circuits including
An antenna matching circuit that extracts the transmission radio wave from the DC superimposed transmission radio wave and sends the transmission radio wave to the antenna,
It is configured with.
[0022]
Further, the second housing part of the mobile phone of the present invention includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, separates the transmission radio wave and the DC voltage from the DC superimposed transmission radio wave, and outputs the separated transmission radio waves and the DC voltage,
Receiving the DC voltage separated by the separation circuit, using the DC voltage as a voltage for operation, an infrared circuit for display and communication, various circuits including an LCD circuit for display,
An antenna matching circuit that receives the transmission radio wave separated by the separation circuit and sends out the transmission radio wave to the antenna;
It is configured with.
[0023]
Further, the second housing portion of the mobile phone according to the present invention includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the DC voltage from the DC superimposed transmission radio wave, and outputs the DC voltage;
Receiving the DC voltage taken out by the separation circuit, using this DC voltage as an operating voltage, an infrared circuit for display and communication, various circuits including an LCD circuit for display,
An antenna matching circuit that receives the DC superimposed transmission radio wave, extracts the transmission radio wave from the DC superimposed transmission radio wave, and sends the transmission radio wave to the antenna;
It is configured with.
[0024]
Further, the second housing part of the mobile phone of the present invention includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the transmission radio wave from the DC superimposed transmission radio wave, and outputs the transmission radio wave,
Receiving the DC superimposed transmission radio wave, extracting the DC voltage from the DC superimposed transmission radio wave, using the DC voltage as a voltage for operation, an infrared circuit for performing display and communication, various circuits including an LCD circuit for displaying,
An antenna matching circuit that receives the transmission radio wave separated by the separation circuit and sends out the transmission radio wave to the antenna;
It is configured with.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0026]
FIG. 1 is a block diagram showing a first embodiment of a mobile phone according to the present invention.
[0027]
In the present embodiment shown in FIG. 1, a first housing 1 that generates and outputs a transmission radio wave, a coaxial cable 3 that transmits the transmission radio wave output by the first housing 1, and a coaxial cable 3 The second housing unit 2 receives a transmission radio wave through the second housing unit 2 and transmits the transmission radio wave to the antenna 4, and the antenna 4 radiates the transmission radio wave.
[0028]
The first housing unit 1 indicates, for example, a lower housing portion of a mobile phone including an operation unit such as an operation key.
[0029]
The second housing 2 is, for example, an upper housing of a mobile phone including an infrared circuit for performing display and communication and an LCD circuit for performing display.
[0030]
The first housing unit 1 includes a transmission circuit 12 that receives a transmission signal including data for transmission generated in the first housing unit 1 and generates a transmission radio wave, and a negative DC voltage (hereinafter, referred to as a negative voltage, for example). ), An amplifying circuit 13 that uses the negative voltage generated by the negative voltage generating circuit 11 as an operating voltage, and amplifies a transmission radio wave generated by the transmitting circuit 12, and an amplifying circuit. A transmission radio wave amplified by the circuit 13 and a negative voltage generated by the negative voltage generation circuit 11 are superimposed to form a DC superimposed transmission radio wave, and a superimposing circuit 14 for outputting the DC superimposed transmission radio wave.
[0031]
The coaxial cable 3 transmits the DC superimposed transmission radio wave output from the superimposition circuit 14.
[0032]
The second housing part 2 receives the DC superimposed transmission radio wave via the coaxial cable 3, separates the DC superimposed transmission radio wave into a negative voltage and a transmission radio wave, and outputs them respectively. Using the negative voltage as a voltage for operation, the antenna 4 matches the antenna 4 in which the extended state and the housed state of the antenna 4 are detected and switched to impedance matching the respective states, and the transmission radio wave output from the separation circuit 22 is sent to the antenna 4. And a circuit.
[0033]
Next, the operation of the mobile phone according to the present embodiment will be described in detail with reference to FIGS.
[0034]
FIG. 2 is a diagram illustrating an example of a waveform of a transmission radio wave amplified by the amplification circuit.
[0035]
FIG. 3 is a diagram illustrating an example of the waveform of the DC superimposed transmission radio wave.
[0036]
In FIG. 1, a transmission circuit 12 receives a transmission signal generated in the first housing 1 and including data for transmission, and generates a transmission radio wave by subjecting the transmission signal to QPSK modulation, for example.
[0037]
The waveform of the transmission radio wave is, for example, a waveform in which a high-frequency SIN wave is modulated by QPSK.
[0038]
The negative voltage generation circuit 11 has a predetermined magnitude (for example, a predetermined voltage value of −5 V to −0.5 V, −2.5 V. The value can be changed as appropriate by the system without being limited to this value. )).
[0039]
The amplification circuit 13 uses the negative voltage generated by the negative voltage generation circuit 11 as an operating voltage, and amplifies the transmission radio wave generated by the transmission circuit 12. FIG. 2 shows the results of the amplification.
[0040]
The superimposing circuit 14 superimposes the transmission radio wave amplified by the amplification circuit 13 and the negative voltage generated by the negative voltage generation circuit 11 to generate a DC superimposed transmission radio wave shown in FIG. 3 and outputs the DC superimposed transmission radio wave.
[0041]
The coaxial cable 3 transmits the DC superimposed transmission radio wave output from the superimposition circuit 14.
[0042]
The separation circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3, separates the DC superimposed transmission radio wave into a negative voltage and a transmission radio wave, and outputs the separated signals.
[0043]
The antenna matching circuit 21 uses the negative voltage output from the separation circuit 22 as an operating voltage, detects the extended state and the housed state of the antenna 4, switches the impedance to match the respective states, and switches the impedance to match the respective states. The output transmission radio wave is sent to the antenna 4.
[0044]
The antenna 4 emits this transmission radio wave.
[0045]
In the above description, the DC superimposed transmission radio wave received via the coaxial cable 3 is separated into a negative voltage and a transmission radio wave by the separation circuit 22 and output, respectively. The received radio wave is received, and the received negative voltage is used as an operating voltage to detect the extended state and the retracted state of the antenna 4, switch the impedance to match the respective states, and transmit the received signal from the separation circuit 22. Although the radio waves are sent to the antenna 4, the antenna matching circuit 21 may be provided with a function of separating the DC superimposed transmission radio waves in the separation circuit 22 as follows.
[0046]
That is, the separation circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3 and outputs the DC superimposed transmission radio wave, and the antenna matching circuit 21 receives the DC superimposed transmission radio wave from the separation circuit 22 and outputs the DC superimposed transmission radio wave. A negative voltage is taken out, the extended voltage and the retracted state of the antenna 4 are detected by using the negative voltage as an operating voltage, the impedance is switched to match the respective states, and the DC superimposed transmission radio wave received from the separation circuit 22 is used. The transmission radio wave may be taken out and transmitted to the antenna 4.
[0047]
Further, the separation circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3, extracts a negative voltage from the DC superimposed transmission radio wave, and outputs the negative voltage and the DC superimposed transmission radio wave. A negative voltage is received from the antenna 22 and the extended voltage and the retracted state of the antenna 4 are detected by using the negative voltage as an operating voltage, and the impedance is switched to an impedance matching the respective states. The transmission radio wave may be extracted from the radio wave and transmitted to the antenna 4.
[0048]
Further, the separation circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3, extracts the transmission radio wave from the DC superimposed transmission radio wave, and outputs the transmission radio wave and the DC superimposed transmission radio wave. 22 receives a DC superimposed transmission radio wave, extracts a negative voltage from the DC superimposed transmission radio wave, uses the negative voltage as an operating voltage, detects the extended state and the retracted state of the antenna 4, and sets the impedance matched to each state. In addition to the switching, the transmission radio wave may be received from the separation circuit 22 and transmitted to the antenna 4.
[0049]
FIG. 4 is a block diagram showing a second embodiment of the mobile phone according to the present invention.
[0050]
In the present embodiment shown in FIG. 4, a first housing unit 5 that generates and outputs a transmission radio wave, a coaxial cable 3 that transmits the transmission radio wave output by the first housing unit 5, and a coaxial cable 3 A second housing unit 6 that receives a transmission radio wave via the antenna and transmits the transmission radio wave to the antenna 4 and an antenna 4 that radiates the transmission radio wave.
[0051]
The first housing unit 5 is, for example, a lower housing unit including an operation unit such as operation keys.
[0052]
The second housing part 6 indicates, for example, an upper housing part of a mobile phone including an infrared circuit for performing display and communication and an LCD circuit for performing display.
[0053]
The first housing unit 5 includes a transmission circuit 12 that receives a transmission signal generated in the first housing unit 5 and that includes data for transmission and generates a transmission radio wave, and a negative voltage generation circuit 11 that generates, for example, a negative voltage. Amplifying circuit 13 that amplifies transmission radio waves generated by transmitting circuit 12 using a negative voltage generated by negative voltage generating circuit 11 as an operating voltage, and a power supply circuit 51 that generates a DC voltage (for example, a positive DC voltage). Voltage (hereinafter, referred to as a positive voltage. This voltage is, for example, a predetermined voltage value of 0.5 V to 5 V, 2.8 V. The voltage can be appropriately changed by the system without being limited to this value.) Is generated), and a superimposing circuit 14 that superimposes the transmission radio wave amplified by the amplifier circuit 13 and the positive voltage generated by the power supply circuit 51 to generate a DC superimposed transmission radio wave and outputs the DC superimposed transmission radio wave.
[0054]
The coaxial cable 3 transmits the DC superimposed transmission radio wave output from the superimposition circuit 14.
[0055]
The second housing section 6 receives the DC superimposed transmission radio wave via the coaxial cable 3, separates the DC superimposed transmission radio wave into a positive voltage and a transmission radio wave, and outputs the separated signals, and the separation circuit 22 outputs the signals. Various circuits 61 including an infrared circuit for controlling an infrared lamp and performing display and communication and an LCD circuit for controlling and displaying an LCD using a positive voltage as an operating voltage, and a transmission radio wave output from the separation circuit 22. And an antenna matching circuit 21 for sending out to the antenna 4.
[0056]
Next, the operation of the mobile phone according to the present embodiment will be described in detail with reference to FIGS.
[0057]
FIG. 5 is a diagram illustrating an example of the waveform of the DC superimposed transmission radio wave.
[0058]
In FIG. 4, a transmission circuit 12, a negative voltage generation circuit 11, and an amplification circuit 13 are the same as those shown in the first embodiment.
[0059]
The superimposing circuit 14 superimposes the transmission electric wave amplified by the amplifier circuit 13 and the positive voltage generated by the power supply circuit 51 to generate a DC superimposed transmission electric wave shown in FIG. 5 and outputs this DC superimposed transmission electric wave.
[0060]
The coaxial cable 3 transmits the DC superimposed transmission radio wave output from the superimposition circuit 14.
[0061]
The separation circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3, separates the DC superimposed transmission radio wave into a positive voltage and a transmission radio wave, and outputs them respectively.
[0062]
The various circuits 61 including the infrared circuit and the LCD circuit perform their operations using the positive voltage output from the separation circuit 22 as the operating voltage. The infrared circuit performs display and communication by controlling an infrared lamp and the like. The LCD circuit performs display by controlling an LCD or the like.
[0063]
The antenna matching circuit 21 receives, for example, a negative voltage from the negative voltage generating circuit 11 of the first housing unit 5 via a power cable (not shown) and uses the negative voltage as an operating voltage to extend the antenna 4. And the storage state is detected, the impedance is switched to the impedance matching the respective states, and a transmission radio wave is received from the separation circuit 22 and transmitted to the antenna 4.
[0064]
The antenna 4 emits this transmission radio wave.
[0065]
In the above description, the DC superimposed transmission radio wave received via the coaxial cable 3 is separated into a positive voltage and a transmission radio wave by the separation circuit 22 and output, respectively, and the various circuits 61 receive the positive voltage from the separation circuit 22. Each operation is performed using this positive voltage as an operating voltage, and the antenna matching circuit 21 receives the transmission radio wave from the separation circuit 22 and sends out this transmission radio wave to the antenna 4. The various circuits 61 and the antenna matching circuit 21 may have a function of separating a DC superimposed transmission radio wave, and may perform the following.
[0066]
That is, the separation circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3 and outputs the DC superimposed transmission radio wave, and the various circuits 61 receive the DC superimposed transmission radio wave from the separation circuit 22 and are more positive than the DC superimposed transmission radio wave. The antenna matching circuit 21 receives the DC superimposed transmission radio wave from the separation circuit 22, extracts the transmission radio wave from the DC superimposed transmission radio wave, and extracts the transmission radio wave. May be sent to the antenna 4.
[0067]
The separating circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3, extracts a positive voltage from the DC superimposed transmission radio wave, and outputs the positive voltage and the DC superimposed transmission radio wave. The antenna matching circuit 21 receives the DC superimposed transmission radio wave from the separation circuit 22, extracts the transmission radio wave from the DC superimposed transmission radio wave, and performs the operation. The transmission radio wave may be sent to the antenna 4.
[0068]
Further, the separation circuit 22 receives the DC superimposed transmission radio wave via the coaxial cable 3, extracts the transmission radio wave from the DC superimposed transmission radio wave, and outputs the transmission radio wave and the DC superimposed transmission radio wave. The antenna matching circuit 21 receives the transmission radio wave from the separation circuit 22, receives the DC superimposed transmission radio wave, extracts a positive voltage from the DC superimposed transmission radio wave, and uses the positive voltage as an operating voltage to perform each operation. The transmission radio wave may be sent to the antenna 4.
[0069]
【The invention's effect】
As described above, according to the mobile phone of the present invention, the first housing unit superimposes the DC voltage on the transmission radio wave to generate a DC superimposed transmission radio wave, and the DC superimposition is performed by the coaxial cable for transmitting the transmission radio wave. The transmission radio wave is transmitted to the second housing portion, a DC voltage is extracted from the DC superimposed transmission radio wave in the second housing portion, and this DC voltage is used as a voltage for operating a circuit provided in the second housing portion in advance. Therefore, the operating voltage of the circuit provided in the second housing is transmitted from the first housing to the second housing via the coaxial cable, so that the voltage of the circuit provided in the second housing is The operating voltage of the circuit provided in the second housing portion can be transmitted from the first housing portion to the second housing portion without laying a power cable for transmitting the operating voltage.
[0070]
Therefore, the number of power cables for the power cables for transmitting the voltage for operating the circuit provided in advance in the second housing part is reduced, and the weight of the reduced power cables is reduced. Therefore, a mobile phone that is advantageous for miniaturization and thinning can be provided.
[0071]
In addition, there is no need to provide a power supply circuit in the second housing portion, and the number of components for the power supply circuit in the second housing portion is reduced.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a first embodiment of a mobile phone according to the present invention.
FIG. 2 is a diagram illustrating an example of a waveform of a transmission radio wave amplified by an amplification circuit.
FIG. 3 is a diagram illustrating an example of a waveform of a DC superimposed transmission radio wave.
FIG. 4 is a block diagram showing a second embodiment of the mobile phone of the present invention.
FIG. 5 is a diagram illustrating an example of a waveform of a DC superimposed transmission radio wave.
FIG. 6 is a block diagram showing a conventional mobile phone.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st housing | casing part 2 2nd housing | casing part 3 Coaxial cable 4 Antenna 5 1st housing | casing part 6 2nd housing | casing part 7 1st housing | casing 8 Power supply cable 11 Negative voltage generation circuit 12 Transmission circuit 13 Amplification circuit 14 Superposition circuit 21 Antenna matching circuit 22 Separation circuit 51 Power supply circuit 61 Various circuits 71 First various circuits 72 Power supply circuit 81 Second various circuits

Claims

In a mobile phone that generates a transmission radio wave and radiates this transmission radio wave from an antenna,
A first housing unit that generates the transmission radio wave, superimposes a DC voltage on the transmission radio wave to generate a DC superimposed transmission radio wave, and outputs the DC superimposed transmission radio wave;
A coaxial cable that transmits the DC superimposed transmission radio wave output by the first housing unit;
The DC superimposed transmission radio wave is received via the coaxial cable, the DC voltage is extracted from the DC superimposed transmission radio wave, and the DC voltage is used as an operating voltage of a circuit provided in advance in the second housing itself. A second housing portion that extracts the transmission radio wave from the DC superimposed transmission radio wave and sends the transmission radio wave to the antenna;
A mobile phone comprising:

3. The antenna matching circuit according to claim 1, wherein the circuit provided in advance is an antenna matching circuit that detects an extended state and a retracted state of the antenna, switches the impedance to impedance matching the respective states, and sends the transmission radio wave to the antenna. The described mobile phone.

3. The mobile phone according to claim 2, wherein the antenna matching circuit extracts the DC voltage from the DC superimposed transmission radio wave and uses the DC voltage as an operating voltage.

4. The mobile phone according to claim 2, wherein the antenna matching circuit extracts the transmission radio wave from the DC superimposed transmission radio wave and sends out the transmission radio wave to the antenna.

The mobile phone according to claim 2, wherein the DC voltage is a negative voltage.

2. The mobile phone according to claim 1, wherein the circuits provided in advance are various circuits including an infrared circuit for displaying and communicating, and an LCD circuit for displaying.

7. The mobile phone according to claim 6, wherein the various circuits take out the DC voltage from the DC superimposed transmission radio wave and use the DC voltage as an operating voltage.

The mobile phone according to claim 6, wherein the DC voltage is a positive voltage.

The first housing section includes:
A transmission circuit that modulates a transmission signal generated in the first housing itself and outputs the transmission radio wave;
A DC voltage generation circuit that generates the DC voltage,
A superimposition circuit that superimposes the DC voltage generated by the DC voltage generation circuit on the transmission radio wave output by the transmission circuit to generate the DC superimposed transmission radio wave and outputs the DC superimposed transmission radio wave,
The mobile phone according to claim 1, further comprising:

The first housing section includes:
A transmission circuit that modulates a transmission signal generated in the first housing itself and outputs the transmission radio wave;
A DC voltage generating circuit for generating a DC voltage;
An amplification circuit that receives the DC voltage generated by the DC voltage generation circuit, and amplifies the transmission radio wave output by the transmission circuit, using the DC voltage as an operating voltage;
A superimposition circuit that superimposes the DC voltage generated by the DC voltage generation circuit on the transmission radio wave amplified by the amplification circuit, generates the DC superimposed transmission radio wave, and outputs the DC superimposed transmission radio wave,
The mobile phone according to claim 1, further comprising:

The second housing section includes:
Receiving the DC superimposed transmission radio wave via the coaxial cable, extracting the DC voltage from the DC superimposed transmission radio wave, using the DC voltage as an operating voltage, detecting the extended state and the retracted state of the antenna, respectively. 11. The mobile phone according to claim 1, further comprising: an antenna matching circuit that switches impedance to match the state of the above, extracts the transmission radio wave from the DC superimposed transmission radio wave, and sends the transmission radio wave to the antenna. Phone.

The second housing section includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, separates the transmission radio wave and the DC voltage from the DC superimposed transmission radio wave, and outputs the separated transmission radio waves and the DC voltage,
The separating circuit receives the separated DC voltage, uses the DC voltage as an operating voltage, detects the extended state and the housed state of the antenna, switches the impedance to match the respective states, and switches the impedance to the matching state. An antenna matching circuit that receives the separated transmission radio wave and sends the transmission radio wave to the antenna;
The mobile phone according to claim 1, 9 or 10, further comprising:

The second housing section includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the DC voltage from the DC superimposed transmission radio wave, and outputs the DC voltage;
The separation circuit receives the DC voltage taken out, uses the DC voltage as an operating voltage, detects an extended state and a stowed state of the antenna, switches to an impedance matched to each state, and performs the DC superposition. An antenna matching circuit that receives a transmission radio wave, extracts the transmission radio wave from the DC superimposed transmission radio wave, and sends the transmission radio wave to the antenna,
The mobile phone according to claim 1, 9 or 10, further comprising:

The second housing section includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the transmission radio wave from the DC superimposed transmission radio wave, and outputs the transmission radio wave,
Receiving the DC superimposed transmission radio wave, extracting the DC voltage from the DC superimposed transmission radio wave, using the DC voltage as an operating voltage, detecting the extended state and the retracted state of the antenna, and matching the impedance to the respective states. And an antenna matching circuit that receives the transmission radio wave extracted by the separation circuit and sends out the transmission radio wave to the antenna.
The mobile phone according to claim 1, 9 or 10, further comprising:

The second housing section includes:
Receives the DC superimposed transmission radio wave via the coaxial cable, extracts the DC voltage from the DC superimposed transmission radio wave, and uses the DC voltage as an operating voltage to perform an infrared circuit for display and communication, and an LCD circuit for display. And various circuits including
An antenna matching circuit that extracts the transmission radio wave from the DC superimposed transmission radio wave and sends the transmission radio wave to the antenna,
The mobile phone according to claim 1, further comprising:

The second housing section includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, separates the transmission radio wave and the DC voltage from the DC superimposed transmission radio wave, and outputs the separated transmission radio waves and the DC voltage,
Receiving the DC voltage separated by the separation circuit, using the DC voltage as a voltage for operation, an infrared circuit for display and communication, various circuits including an LCD circuit for display,
An antenna matching circuit that receives the transmission radio wave separated by the separation circuit and sends out the transmission radio wave to the antenna;
The mobile phone according to claim 1, further comprising:

The second housing section includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the DC voltage from the DC superimposed transmission radio wave, and outputs the DC voltage;
Receiving the DC voltage taken out by the separation circuit, using this DC voltage as an operating voltage, an infrared circuit for display and communication, various circuits including an LCD circuit for display,
An antenna matching circuit that receives the DC superimposed transmission radio wave, extracts the transmission radio wave from the DC superimposed transmission radio wave, and sends the transmission radio wave to the antenna;
The mobile phone according to claim 1, further comprising:

The second housing section includes:
A separation circuit that receives the DC superimposed transmission radio wave via the coaxial cable, extracts the transmission radio wave from the DC superimposed transmission radio wave, and outputs the transmission radio wave,
Receiving the DC superimposed transmission radio wave, extracting the DC voltage from the DC superimposed transmission radio wave, using the DC voltage as a voltage for operation, an infrared circuit for performing display and communication, various circuits including an LCD circuit for displaying,
An antenna matching circuit that receives the transmission radio wave separated by the separation circuit and sends out the transmission radio wave to the antenna;
The mobile phone according to claim 1, further comprising: