이동통신용 능동배열안테나에 관한 연구

윤기호 호남대학교 정보통신연구소 2001 정보통신연구 Vol.11 No.-

In this paper, Active Array Antenna system for high power repeater or mini BTS of PCS mobile communication system was described. Each element o micros01p antenna with 2x8 array was directly connected with a power amp]ifier with 0.2 watt to get spatial power combining, so that the implemented system was more economic and reliable in electrical performance than conventional systems. Total 53dBm EIRP(effective isotropic radiated power), horizontal angle of 50 and vertical angle of 10 as antenna half power beam width, and 60 watt DC power consumption were obtained. In addition, ACPR(adjacent channel power rejection) performance, spurious characteristics required for CDMA based mobile system, was satisfied at maximum EIRP of 53dBm. These results prove that this system can b substituted with high power repeater with 20 watt output power Active Array Antenna system for high power repeater of IMT2000 is now under developing.

UHF RFID 리더기용 안테나에 관한 연구

윤기호 호남대학교 2005 호남대학교 학술논문집 Vol.26 No.2

In this paper, Dual-polarized Tx/Rx antenna for RFID reader has been desribed in detail. Each feeding network of Tx/Rx has been designed to improve port-isolation and cross-polarization. and sequential rotation feeding scheme has been applied to increase axial ratio bandwidth. From the test results for the bandwidth between 900MHz and 928MHz, it has been confirmed that antenna gain is over 2.35dBi, axial ratio bandwidth, is 150-MHz, port isolation is between -38dB and -40dB, and cross-polarization is between -30dB and -40dB.

후천개벽의 종교학적 연구

윤기봉,유승종 대진대학교 1995 大眞論叢 Vol.3 No.-

The main purpose of this study is in the examination of concept of Hu-Chun-Gae-Byuk. The problem of dukkha and diease has alway played an important part in the attitude of Dae Soon and Buddhism. One of the Cardinal and noble truths of Buddhism was that everything was sorrow. And all regrets was of moral origin and the culmination of morality is in theory of Hae-Won. Man is asked to proceed on the course of moral struggles for the removal of diease and sorrow. And so the object of actions and feelings, Charity are the stimulation of moral progress. Conclusionally the concept of Hu-Chun-Gae-Byuk define in terms of its highest ideals and perfection of its moral culture. in Dae Soon thoughts.

힌두이즘의 神性(Devata) 意味 小考

尹起鳳 대진대학교 1993 大眞論叢 Vol.1 No.-

Theisticand atheistic philosophies in India have often been mixed up with theological discussions which throw some light on the existence and nature of God. The idea of God is almost universal and instinctive also in India. India have a variety of pictures of God. This variety is easily intelligible when we realise that each religious genius spells out the mystery of God. In Rg-Veda these descriptions of God often conflict with one another But these descriptions depends on the concept of lower self and the concept of the Supreme Self in B.G. which may be outlined as below. 1) The lower self and the Supreme Self are both eternal. 2) The Supreme Self is an Infinite Unit. 3) The Supreme Self in the universe is omnipresent 4) Within a limited range, the lower self is allowed to function. 5) The Supreme Self is perfect in all respects. In this structure, Conclusion is that The formula 『Sat』alone could not have distingushed 'Him' from the two other entities that 『Cit』. Sat-Cit would confuse him with the souls, as they both 'are and know' Sat-Cit-anand brings out both his similarities with and points of difference from souls and matter.

독일의 개정 임대차법에 관한 연구 : 주택임대차에 관한 규정을 중심으로 Zum Wohnraummietrecht

윤기택,김종현 청주대학교 학술연구소 2004 淸大學術論集 Vol.4 No.-

Die deutsche Mietrechtsreform fu¨hrt durch die Zusammenfassung des bisher in verschiedenen Gesetzen geregelten mietrechtlichen Vorschriften im Bu¨rgerlichen Gesetzbuch (BGB) und ihre jetzt u¨bersichtliche Gliederung insbesondere im Bereich der Wohnraummiete zu einer erheblichen Vereinfachung fu¨r die Betroffenen. Daneben entha¨lt das im BGB zusammengefaβte Wohnraummietrecht aber auch wichtige inhaltliche A¨nderungen. Wa¨hrend der Mieterschutz an einigen Stellen ausgebaut wird, wird die Vertragsfreiheit gesta¨rkt. Das im deutschen BGB zusammengefaβte private Mietrecht finden sich jetzt in den §§ 535 ff. BGB. Eingeleitet werden sie durch allgemeine Vorschriften fu¨r Mietverha¨ltnisse, also Vorschriften, die unabha¨ngig von der Art der gemieteten Sache fu¨r alle Arten von Mietverha¨ltnissen gelten. Daran anschliβend gliedern sich die Vorschriften u¨ber Wohnraummiete, und schlieβlich u¨ber andere Sache (z.B. Gescha¨ftsraummiete). Das deutsche Wohnraummietrecht ist die Vorschriften u¨ber die Miete und Betriebskosten ausfu¨hrlich geregelt. Fu¨r frei finanzierte Wohnungen werden die Mieten bei Abschluβ des Mietvertrages und bei spa¨teren Mieterho¨hungen grundsa¨tzlich frei vereinbart. Falls Vermieter und Mieter Wohnungen sich aber nicht auf eine frei vereinbarte Mieterho¨hung einigen, kann der Vermieter eine gerechtfertigte Mieterho¨hung nach dem Vergleichsmietensystem durchsetzen. Betriebskosten bleiben insoweit auβer Betracht. Bei der Mieterho¨hung wegen gestiegener Vergleichsmiete darf er die Miete aber innerhalb von 3 Jahren nur maximal 20% erho¨hen. Hat der Mieter das Mieterho¨hungsverlangen erhalten, kann er das Mietverha¨ltnis schriftlich ku¨ndigen. Nach einer vorgesehenen Modernizierung dart der Vermieter die Miete auch erho¨hen. Der Mieter hat dabei ebenfalls ein spezielles Ku¨ndigungsrecht. Bei der Abrechnung der Betriebskosten bringt die Mietrechtsreform durch die neue Regelung mehr Klarheit. Nach dem deutschen Wohnraummietrecht endet ein Mietverha¨ltnis auf bestimmte Zeit mit Ablauf der vertraglich vereinbarten Mietzeit, und ein Mietverha¨ltnis auf unbestimmte Zeit durch eine wirksame Ku¨ndigung nach Abaluf der Ku¨ndigungsfrist. Hier gibt es verschiedene Ku¨nigungsarten. Das Gesetz unterscheidet zwischen ordentlicher und auβerordentlicher Ku¨ndigung (also die fristlose Ku¨ndigung). Bei der ordentlichen Ku¨ndigung kann der Vermieter nur dann ku¨ndigen, wenn er ein berechtigtes Interesse an der Beendigung des Mietverha¨ltnisses hat. Diese Ku¨ndigung des Vermieter muβ der Mieter nicht in jedem Fall hinnehmen. Vielmehr kann er unter bestimmten Umsta¨nde widersprechen und die Fortsetzung des Mietverha¨ltnisse verlangen. Auβerdem kann der Vermieter oder der Mieter das Mietverha¨ltnis fristlos ku¨ndigen, wenn sich ein Vertragspartner so schwerwiegende Vertragsverletzungen zuschulden kommen la¨sst, daβ dem underen Teil die Fortsetzung des Mietverha¨ltnisses nicht zugemutet werden kann. Zwischen deutschem und koreanischem Wohnraummietrecht bestehen die rechtsvergleichend bemerkenswerten Unterschiede im Hinblick auf das Mieterho¨hungsverlangen und das Eintrittsrechtbei Tod des Mieters. Wa¨hrend nach deutschem Wohnraummietrecht fu¨r die Mieterho¨hung sog. die ortsu¨bliche Vergleichsmiete (und auch sog. die Kappungsgrenze) in Betracht kommt, wird im koreanischen Wohnraummietrecht nur prozentuale Obergrenze beru¨cksichigt. Zudem hat im deutschen Mietrecht der Vermieter einen Anspruch auf Zustimmung zur Mieterho¨hung bis zur ortsu¨blichen Vergleichsmiete. Dagegen wird in Korea dieser einfach als Gestaltungsrecht angesehen. Fu¨hrt in Deutschlund der Mieter mit seinem Lebenspartner einen gemeinsamen Haushalt, so tritt mit dem Tod des Mieters der Lebenspartner in das Mietverha¨ltnis ein. Wenn er nicht eintreten will, so wird es mit den Erben des Mieters fortgefu¨hrt. Aber nach dem koreanischen Wohnraummietrecht treten in diesem Fall der Lebenspartner und den Erben des Mieters gemeinsam ein.

ITS RF 송수신기용 주파수합성기의 설계에 관한 연구

윤기호 호남대학교 정보통신연구소 2000 정보통신연구 Vol.10 No.-

In this paper, frequency synthesizer module of 5.8GHz RF transceiver for intelligent transportation system(ITS) is described. This module is to target cost reduction as well as realizing economic system. 5.8GHz local signal is obtained from tripler followed by band pass filter, using existing dual PLL module of PCS phone. The implemented module has -95dBc minimum at 10KHz offset and -120dBc minimum at 2.0MHz for 380MHz Oscillator, -97dBc minimum at 10KHz offset and -120dBc minimum at 2.0MHz for 1,796MHz Oscillator, respectively. These phase noise enable overall transceivers communicate with data speed of 2.048Mbps.

유전체 여파기와 결합된 PCS용 전력증폭기의 구현

윤기호 호남대학교 1997 호남대학교 학술논문집 Vol.18 No.4

In this paper, the implementation of Power Amplifier combined with the dielectric transmitting filter moved from exiting Duplexer for PCS phone is described. The dielectric band rejection filter is located between two GaSa RETs to attenuate spurious and noises in the receiveing frequency band. In addition, The low pass filter in the output stage of Power FET is enforced to reject harmonic components of transmitting signals. To reduce module size, 1005 chip components are mounted on 4-layer board. As a result, the module size is as small as 0.7CC(16×14.5×3mm³). The power amplifier module has achived ACPR performace with 2 to 3dB margin from IS-95 requirement at the output power level, 21dBm. Owing to dielectric band rejection filter and harmonic rejection filter, attenuation is 47dB at receiving frequency band(1840~1870MHz) and 2nd and 3rd harmonics are rejected to be 62dBc and 65dBc, respectively. By the way, comparing with conventional power amplifier, about 50mA of total current is saved because maximum transmitting power is decreased, which means that battery life is going to be extended.

특수 언어발달 장애 환아의 임상 및음향음성학적 특성연구

김연희,박세훈,신용일,김찬양,김현기,김정수 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.1

業說의 始原과 變遷에 관한 小考 : Its Origin & Interpretation in Jainism

尹起鳳 대진대학교 1993 大眞論叢 Vol.1 No.-

The main purpose of this study is in the examination of the Karma theory. The theory of Karma has played a very important role in philosophical, religious discourses and in the lives of Hindu, for over 4000 years. Karma is an extension of the vedic conception of rta and istapurta (ChⅡ). Rta in the thought of the Rg-Veda is the principle of Cosmic order which controls, unifies all phenomena. The origin of Karma is also traced to the ritualistic tradion of the Vedic Indians to ista purta. Dosa is the Rg-Veda (ChⅡ-2) is understood as the violation of the moral law and as ritualistic pollution. Karma is the apprehension and expression of the moral order of the universe and dosa is an expression of man's need for purity and the supreme good. The Jain theory of Karma (Chⅲ) is the most comprehensive of all in providing us with details of Karmic processes of its operation. Like Buddhism, Jainism also does not believe in the existence of a monotheistic God. What distinguishes Jaina conception of Karma from ancient India is its conception of Karma from ancient India is its conception of Karma as material As I descrived in outline above, Karma is in the center of all the conception in the Jaina, and Buddhism.

B급 Bias 동작에서 PCS 전화기용 전력증폭기의 최적 설계에 관한 연구

윤기호 湖南大學校 1997 호남대학교 학술논문집 Vol.18 No.2

In this paper, the design and implementation of Power Amplifier which is used as a critical part for a mobile phone of Korean PCS System scheduled at the end of this year is described. Operating point of DC Bias is limited under Class-B considering that Battery consumption at the output level of Power amplifier which has been mainly using in the real CDMA environment depends upon its operating point. Power amplifier is designed by Load/Source pull method using two GaAS MESFETs which have good linerity at low operating point and electro-magnetic coupling between narrow microstrip lines is counted to design the circuit. Module size of 0.65CC(16×13.5×3㎣), drain supply votage of 3.6V and drain current of 130mA at Quiescent point are attained. The power amplifier module has achieved ACPR performance with 2 to 3dB margin from IS-95 requirement at the output power level, 23.5dBm. For mass production, performance sensitivity over variation of transmission line widths should be improved and more margins in an electrical specfication are required.