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The Journal of microwave power最新文献

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Continuous recording instrument for RF-exposure measurements in FM/TV broadcasting towers. 调频/电视广播塔射频曝光测量连续记录仪。
The Journal of microwave power Pub Date : 1984-09-01 DOI: 10.1080/16070658.1984.11689363
K Jokela, M Ylönen
{"title":"Continuous recording instrument for RF-exposure measurements in FM/TV broadcasting towers.","authors":"K Jokela,&nbsp;M Ylönen","doi":"10.1080/16070658.1984.11689363","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689363","url":null,"abstract":"<p><p>A continuously recording exposure meter has been developed for radio-frequency (RF) hazard measurements in FM/TV broadcasting towers for the frequency range 47-790 MHz. The instrument consists of an electrically-small dipole, loop probes and recording electronics. The dipole and loop are attached to the safety helmet; their distance from the head is approximately 7 cm. The dipole and loop respond to the tangential E field and radial H field, respectively. The error due to body proximity and one-dimensionality is 1 to 2 dB at 100 MHz and 2 to 3 dB at 200 MHz (for average power density measurements) if the probes move continuously and the measurement period is sufficiently long. Measurements in Finnish FM/TV towers showed that the average power density inside the tower increases with increasing power and decreasing antenna surface area. The highest levels have been found near UHF and FM antennas. For the FM band (100 MHz) the average H field exposures exceed the new ANSI standard value 10 W/m2, but remain in most cases below 100 W/m2. Local maxima may exceed 300 W/m2.</p>","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 3","pages":"159-72"},"PeriodicalIF":0.0,"publicationDate":"1984-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16070658.1984.11689363","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17625161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Science and standards. The case of ANSI C95.1--1982. 科学与标准。ANSI C95.1—1982的案例。
The Journal of microwave power Pub Date : 1984-09-01 DOI: 10.1080/16070658.1984.11689362
N H Steneck
{"title":"Science and standards. The case of ANSI C95.1--1982.","authors":"N H Steneck","doi":"10.1080/16070658.1984.11689362","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689362","url":null,"abstract":"","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 3","pages":"153-8"},"PeriodicalIF":0.0,"publicationDate":"1984-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16070658.1984.11689362","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17625160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Storage and microwave reheating effects on lipid oxidation of roast beef. 贮藏和微波再加热对烤牛肉脂质氧化的影响。
The Journal of microwave power Pub Date : 1984-09-01 DOI: 10.1080/16070658.1984.11689366
J H Hsieh, R E Baldwin
{"title":"Storage and microwave reheating effects on lipid oxidation of roast beef.","authors":"J H Hsieh,&nbsp;R E Baldwin","doi":"10.1080/16070658.1984.11689366","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689366","url":null,"abstract":"<p><p>Sensory analysis and thiobarbituric acid (TBA) tests were conducted on beef (Longissimus muscle) which had been roasted in a conventional electric oven at 163 degrees C (325 degrees F), sliced and stored in either a vacuum package or in a casserole at 4 degrees C (40 degrees F), for two or for seven days, and then reheated in a conventional or in a microwave oven. Methods of reheating, microwave or conventional oven, did not influence sensory scores for warmed-over aroma or flavor or TBA values. Method of packaging influenced both sensory scores and TBA values whereas length of storage affected only TBA values.</p>","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 3","pages":"187-94"},"PeriodicalIF":0.0,"publicationDate":"1984-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16070658.1984.11689366","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17625162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Effect of microwave irradiation (2450 MHz) on murine cytotoxic lymphocyte and natural killer (NK) cells. 微波辐照(2450 MHz)对小鼠细胞毒性淋巴细胞和自然杀伤细胞的影响。
The Journal of microwave power Pub Date : 1984-06-01 DOI: 10.1080/16070658.1984.11689356
P Deschaux, T Douss, R Santini, P Binder, R Fontanges
{"title":"Effect of microwave irradiation (2450 MHz) on murine cytotoxic lymphocyte and natural killer (NK) cells.","authors":"P Deschaux,&nbsp;T Douss,&nbsp;R Santini,&nbsp;P Binder,&nbsp;R Fontanges","doi":"10.1080/16070658.1984.11689356","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689356","url":null,"abstract":"<p><p>Male Balb/c mice were exposed in an anechoic chamber to 2450 MHz CW microwaves at 5, 10, 15, and 20 mW/cm2, 4 hours daily for 4 days, under controlled environmental conditions. T-cell cytotoxicity and natural killer (NK) cell activity were compared in exposed and sham animals. A significant decrease (p less than 0.001) of cell-mediated cytotoxicity was observed only for a power density of 20 mW/cm2. A significant increase (p less than 0.01) in NK activity was demonstrated following exposures at 15 mW/cm2.</p>","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 2","pages":"107-10"},"PeriodicalIF":0.0,"publicationDate":"1984-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16070658.1984.11689356","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17394385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Calculated power absorption patterns for hyperthermia applicators consisting of electric dipole arrays. 由电偶极子阵列组成的热疗装置的计算功率吸收模式。
The Journal of microwave power Pub Date : 1984-03-01 DOI: 10.1080/16070658.1984.11689345
C T Tsai, C H Durney, D A Christensen
{"title":"Calculated power absorption patterns for hyperthermia applicators consisting of electric dipole arrays.","authors":"C T Tsai,&nbsp;C H Durney,&nbsp;D A Christensen","doi":"10.1080/16070658.1984.11689345","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689345","url":null,"abstract":"<p><p>We have applied the plane-wave spectrum method to obtain a technique for calculating the internal fields in a lossy dielectric half-space irradiated by rather arbitrary sources. We used the technique to calculate power absorption profiles of some idealized aperture sources to gain insight into how the source parameters affect the power absorption profile. With this insight, we next calculated power absorption profiles of some linear electric dipole antenna arrays. From these results we developed a simpler method of optimizing the antenna parameters by calculating their field pattern in an infinite water medium, which does not require the PWS method and is therefore faster and cheaper. Using this technique, we found an antenna array with reasonably practical parameters that produces an appealing calculated power absorption profile. We also made some calculations based on a simple approximate model that indicate that a three-element dipole array on the front of a patient and a similar one on the back could produce deep central heating. Although our calculations are based on a somewhat crude dielectric half-space model of the body, the results provide valuable insight about power absorption profiles and indicate that practical systems for producing deep internal heating without overheating the surface of the body could be developed.</p>","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"1984-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16070658.1984.11689345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17620711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Systemic alteration in blood glucose levels following localized deep microwave hyperthermia. 局部深度微波热疗后血糖水平的全身性改变。
The Journal of microwave power Pub Date : 1984-03-01 DOI: 10.1080/16070658.1984.11689352
A Yerushalmi, I Katzap, F Gottesfeld, D D Bass
{"title":"Systemic alteration in blood glucose levels following localized deep microwave hyperthermia.","authors":"A Yerushalmi,&nbsp;I Katzap,&nbsp;F Gottesfeld,&nbsp;D D Bass","doi":"10.1080/16070658.1984.11689352","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689352","url":null,"abstract":"<p><p>Blood glucose levels were temporarily elevated in normal rabbits subjected to one localized microwave hyperthermia treatment in the rectum. A major peak of blood glucose level was observed 8 hours after treatment, and a second minor peak was measured 14-17 hours after treatment. These findings indicate that localized microwave hyperthermia affects the host systemically.</p>","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 1","pages":"73-6"},"PeriodicalIF":0.0,"publicationDate":"1984-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16070658.1984.11689352","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17620447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electromagnetic dosimetry in a Crawford cell: 225 to 500 MHz. 克劳福德电池的电磁剂量测定:225至500兆赫。
The Journal of microwave power Pub Date : 1984-03-01 DOI: 10.1080/16070658.1984.11689346
A S Segal, R L Magin, C A Cain
{"title":"Electromagnetic dosimetry in a Crawford cell: 225 to 500 MHz.","authors":"A S Segal,&nbsp;R L Magin,&nbsp;C A Cain","doi":"10.1080/16070658.1984.11689346","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689346","url":null,"abstract":"<p><p>A Crawford cell exposure chamber (main section 30 cm square) was used for electromagnetic dosimetry in the 225 to 500 MHz frequency range. Electric field patterns were measured within the cell. No higher-order modes were observed at any of the frequencies studied below 500 MHz, but significant field perturbations were seen at 2450 MHz. Energy absorption in a prolate spheroidal hamster phantom and in saline-filled spheres of various sizes was measured. The normalized whole-body specific absorption rate (SAR) in watts/kg per mW/cm2 increased from 0.11 (at 225 MHz) to 0.42 (at 450 MHz) for the hamster phantom in E polarization, from 0.06 (at 325 MHz) to 0.20 (at 500 MHz) for K polarization, and from 0.03 (at 325 MHz) to 0.12 (at 500 MHz) for H polarization. Although these values exceed predictions from the long-wavelength far-field approximation for power absorption, the measured SARs were corroborated directly using calorimetry. In addition, calorimetric data obtained using saline-filled spheres suggests that absorbed power in a Crawford cell converges to the far-field plane wave theoretical values only for objects occupying less than 20% of the vertical dimension from the septum to the outer wall.</p>","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 1","pages":"15-24"},"PeriodicalIF":0.0,"publicationDate":"1984-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/16070658.1984.11689346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17620446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Microwave Rectification by Unbiaded Glow Discharge Lamp 无极辉光放电灯微波整流
The Journal of microwave power Pub Date : 1984-01-01 DOI: 10.1080/16070658.1984.11689349
S. L. Lopuch, T. Ishii
{"title":"Microwave Rectification by Unbiaded Glow Discharge Lamp","authors":"S. L. Lopuch, T. Ishii","doi":"10.1080/16070658.1984.11689349","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689349","url":null,"abstract":"AbstractRectification of S-band microwaves by a neon indicator lamp without cle bias is reported. A simplified phenomenologieai theory based on nonuniform RF electric field distribution is presented together with experimental verification.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"19 1","pages":"47-53"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82118423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Products and Developments: A New Magnetron (2M172A) from Toshiba1 新产品和发展:东芝的新型磁控管(2M172A)
The Journal of microwave power Pub Date : 1984-01-01 DOI: 10.1080/16070658.1984.11689369
I. Namba, N. Tashiro, K. Nakai, Hisao Saito
{"title":"New Products and Developments: A New Magnetron (2M172A) from Toshiba1","authors":"I. Namba, N. Tashiro, K. Nakai, Hisao Saito","doi":"10.1080/16070658.1984.11689369","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689369","url":null,"abstract":"AbstractA new magnetron has been developed and introduced into the market for domestic microwave ovens. Fully compatible with the current type 2M172, the new 2M172A has a compact anode with a high thermal endurance, designed by the use of a structural analysis program, (SAP), and a lower power filament designed by a finite element method (FEM). The paper illustrates the design challenges, the evolution and the performance of this series of magnetrons.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"91 1","pages":"209-220"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81254807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Use of Transmission-line Matrix Method in Determining the Resonant Frequencies of Loaded Microwave Owens 利用传输在线矩阵法确定负载微波欧文斯谐振频率
The Journal of microwave power Pub Date : 1984-01-01 DOI: 10.1080/16070658.1984.11689351
El-Deek M. El-Sayed, M. N. Morsy
{"title":"Use of Transmission-line Matrix Method in Determining the Resonant Frequencies of Loaded Microwave Owens","authors":"El-Deek M. El-Sayed, M. N. Morsy","doi":"10.1080/16070658.1984.11689351","DOIUrl":"https://doi.org/10.1080/16070658.1984.11689351","url":null,"abstract":"AbstractIn this paper the transmission-line matrix (TLM) numerical analysis technique is used to determine the resonant frequencies of propagating modes in loaded microwave ovens. An investigation is reported for the variation of resonant frequencies of transverse electric, TE, and transverse magnetic, TM, modes as a function of height of the loading material. Effect of varying the dielectric constant and location of the load in behaviour of mode-tuning is also illustrated. The presented numerical computed results are for a rectangular cavity of a commercial microwave oven and at the heating frequency of 915 MHz.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"46 1","pages":"65-71"},"PeriodicalIF":0.0,"publicationDate":"1984-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81635217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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