권호 표지

Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science

  • Bimonthly
  • /
  • 2671-7255(pISSN)
  • /
  • 2671-7263(eISSN)

Domain

  • Physics ＞ Particle Physics/Field Theory

Aim & Scope

The Journal of Electromagnetic Engineering and Science (JEES) is an official English-language journal of the Korean Institute of Electromagnetic and Science (KIEES). This journal was launched in 2001 and has been published quarterly since 2003. It is currently registered with the National Research Foundation of Korea and also indexed in Scopus, CrossRef and EBSCO, DOI/Crossref, Google Scholar and Web of Science Core Collection as Science Citation Index Expanded (SCIE) Journal. The objective of JEES is to publish academic as well as industrial research results and discoveries in electromagnetic engineering and science. The particular scope of the journal includes electromagnetic field theory and its applications: High frequency components, circuits, and systems Antennas, smart phones, and radars Electromagnetic wave environments Relevant industrial developments In addition to the regular stream of contributed papers, the journal occasionally publishes special issues on specific topics of current interest, to promote a focused coverage of the selected topics. In addition, JEES regularly posts invited review papers by leading researchers in the relevant fields, which will provide an overview of various subjects from their own perspectives. The editors of JEES are aware of the importance of rapid publication for the delivery of new research results to its readers with minimum delay, and fully recognize the need for a short turnaround time. Manuscripts submitted to JEES take about 3–5 months from the initial submission to publication. This rapid process applies to all three types of manuscripts that JEES publishes: regular papers, letters, and invited papers. The publication of submitted manuscripts is subject to peer review, and the final decision by the Editor-in-Chief is regularly made based on three reviews from experts in the relevant area. This journal actively promotes research in electromagnetic wave-related engineering and sciences, and its ultimate aim is to benefit the global electromagnetic engineering and science community.

KSCI KCI SCOPUS SCI SCIE

Volume 7 Issue 1

  1. Kong, Hyung-Yun;Lee, Dong-Un 1
    https://doi.org/10.5515/JKIEES.2007.7.1.001 PDF KSCI
    Recently, Mc(Multi-code) modulation/demodulation(modem) technique has been explored for high speed data transmission in wireless environment. The conventional Mc modem generates some side effects such as allocating Walsh codes, which motivates to propose a novel Mc modem method with sub-code. Our proposed system should expanded the size of sub-code to provide high-rate data transmission, which also affect adversely to the performance of the system with high PAPR(Peak to Average Power Ratio). Thus, in this paper, we propose a novel pre-coded Multi-Dimensional HCOC(High Capacity Orthogonal Code) Mc modem technique to reduce the high PAPR, which enables the performance improvement. This proposed system can be easily designed by concatenating HCOC Mc modem with the generic Mc modem. The pre-coding technique that is used in this paper is CAC(Constant Amplitude Coding), that helps the system maintain the constant transmission power and reduce the maximum transmission power.
  2. Kahng, Sung-Tek 7
    https://doi.org/10.5515/JKIEES.2007.7.1.007 PDF KSCI
    PCB Power-Bus (comprising power/ground planes) impedance and fields are evaluated by an efficient series expansion method that is suggested in this paper. It is used to investigate the structure's radiated emission(RE) levels and find acceptable ways of loading the power/ground planes such as decoupling capcitor(DeCap)s, balanced feeding and slits, in order to reduce the interferences. Also, the calculations and measurements of a proposed geometry are verified by vector fitting as a analysis model to check the behavior of the slit.
  3. Chang, Ki-Hun;Lee, Woo-Sung;Yoon, Young-Joong;Kim, Jae-Kwon;Park, Joo-Yong;Burm, Jin-Wook 12
    https://doi.org/10.5515/JKIEES.2007.7.1.012 PDF KSCI
    A UHF band wireless identification system based on passive surface acoustic wave(SAW) devices is presented in this paper. SAW ID tags were fabricated on Y-Z $LiNbO_3$ piezoelectric substrate with a good electro-mechanical coupling property. To reduce degradation of the antenna performance associated with the piezoelectric materials, an efficient design of the SAW RFID antenna is introduced. By measuring the parameters of the SAW ID tag, the performance of the antenna was tested by experimentation.
  4. Lee Moon-Ho;Pokhrel Subash Shree;Choe Chang-Hui;Kim Chang-Joo 17
    https://doi.org/10.5515/JKIEES.2007.7.1.017 PDF KSCI
    Jacket matrices which are defined to be $n{\times}n$ matrices $A=(a_{jk})$ over a field F with the property $AA^+=nI_n$ where $A^+$ is the transpose matrix of elements inverse of A,i.e., $A^+=(a_{kj}^-)$, was introduced by Lee in 1984 and are used for signal processing and coding theory, which generalized the Hadamard matrices and Center Weighted Hadamard matrices. In this paper, some properties and constructions of Jacket matrices are extensively investigated and small orders of Jacket matrices are characterized, also present the full rate and the 1/2 code rate complex orthogonal space time code with full diversity.
  5. Lee Moon-Ho;Pokhrel Subash Shree;Choi Seung-Je;Kim Chang-Joo 28
    https://doi.org/10.5515/JKIEES.2007.7.1.028 PDF KSCI
    In this paper, we present a quasi-Jacket block matrices over binary matrices which all are belong to a class of cocyclic matrices is the same as the Hadamard case and are useful in digital signal processing, CDMA, and coded modulation. Based on circular permutation matrix(CPM) cocyclic quasi block low-density matrix is introduced in this paper which is useful in coding theory. Additionally, we show that the fast algorithm of quasi-Jacket block matrix.
  6. Na, Seung-Kwan;Kim, Chang-Hwan;Jin, Yong-Ok 35
    https://doi.org/10.5515/JKIEES.2007.7.1.035 PDF KSCI
    An alternative solution to the problem of obtaining acceptable performances on a fading channel is the diversity technique, which is widely used to combat the fading effects of time-variant channels. The symbol error probability of M-ary DPSK (MDPSK), PSK (MPSK) and QAM (MQAM) systems using 2 branches from the branch with the largest signal-to-noise ratio(SNR) at the output of L-branch selection combining(SC), i.e., SC2 in frequency-nonselective slow Nakagami fading channels with an additive white Gaussian noise(AWGN) is derived theoretically. These performance evaluations allow designers to determine M-ary modulation methods against Nakagami fading channels.
  7. Kahng, Sung-Tek;Ju, Jeong-Ho;Moon, Won-Gyu 42
    https://doi.org/10.5515/JKIEES.2007.7.1.042 PDF KSCI
    This paper presents a linear amplitude equalizer developed to secure the linearity of the slope of the amplitude over the frequency band ranging $2\sim18\;GHz$. The circuit model is featured by the resistor placed between each pair of a transmission-line and a stub. The design includes finding the values of resistors and stubs to have the optimal linear slope and return loss performances. The measured data show the acceptable performances of the slope variation and return loss over $2\sim18\;GHz$.
  8. Cho, Chi-Hyun;Choo, Ho-Sung;Park, Ik-Mo 47
    https://doi.org/10.5515/JKIEES.2007.7.1.047 PDF KSCI
    We investigated the effects of substrate, metal-line, and surface material on the performance of radio frequency identification(RFID) tag antenna using a tag antenna with a meander line radiator and T-matching network. The results showed that readability of the tag antenna with a thin high-loss substrate could be increased so that it was similar to that of a low-loss substrate if the substrate was very thin. The readability of the tag antenna decreased significantly when the metal line was thinner than the skin depth. The readability of the tag also decreased drastically when the tag was attached to high-permittivity high-loss target objects.