Some experiments on conducting screens for a U-type spaced-aerial radio direction-finder in the frequency range 600????????1200 Mc/s

Pearce R.R.

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Some experiments on conducting screens for a U-type spaced-aerial radio direction-finder in the frequency range 600????????1200 Mc/s

机译：在频率范围600 ????? 1200 Mc / s的U型空地无线电测向仪进行屏蔽时的一些实验

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A description is given of a simple U-type rotatable radio direction-finder, which was used to investigate the improvement in performance of short-wave direction-finders obtained by the use of large earth screens, and to determine the smallest ratio of screen-size/wavelength for which the polarization errors were reduced to a satisfactorily small value (????????1 deg). The screens were constructed of sheet metal, wire netting and radial wires, and the results showed that provided a metal sheet was not less than 4???????? in diameter, polarization errors as small as 1 deg could be attained. For wire-netting screens of the same diameter, a mesh size not greater than ???????? was required to attain this performance.

机译：给出了一个简单的U型可旋转无线电测向仪的描述，该调查仪用于研究通过使用大型接地筛获得的短波测向仪性能的提高，并确定最小的筛检比。偏振误差减小到令人满意的较小值（Δθ≤1度）的尺寸/波长。筛网由金属薄板，金属丝网和径向金属丝构成，结果表明，提供的金属薄板不少于4个。在直径上，偏振误差可低至1度。对于相同直径的金属丝网，其网眼尺寸不得大于?????????需要达到此性能。

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《Electrical Engineers - Part III: Radio and Communication Engineering, Journal of the Institution of》 |1947年第28期|共3页
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Pearce R.R.;
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1. Some experiments on conducting screens for a U-type spaced-aerial radio direction-finder in the frequency range 600????????1200 Mc/s [J] . Pearce R.R. Electrical Engineers - Part I: General, Journal of the Institution of . 1947,第77期

机译：在频率范围600 ????? 1200 Mc / s的U型空地无线电测向仪进行屏蔽时的一些实验
2. Discussion on ????????Basic ground-wave propagation characteristics in the frequency band 50????????800 Mc/s???????? and ????????Ground-wave field-strength surveys at 100 and 600 Mc/s???????? before the Radio Section, 10th February, 1954 [J] . Proceedings of the IEE - Part III: Radio and Communication Engineering . 1954,第72期

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3. Discussion on ????????The relative merits of presentation of bearings by aural-null and twin-channel cathode-ray direction-finders???????? and ????????Some experiments on the accuracy of bearings taken on an aural-null direction-finder???????? before the Radio Section, 11th January, 1950 [J] . Proceedings of the IEE - Part III: Radio and Communication Engineering . 1950,第49期

机译：讨论零位和双通道阴极射线定向仪呈现轴承的相对优点和????????????????????????????????????????????????? 1950年1月11日在无线电部之前
4. A study of changes to specific absorption rates in the human eye close to perfectly conducting spectacles within the radio frequency range 1.5 to 3.0 GHz [C] . Whittow, W., Edwards, . 2003

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6. Soft Radio-Frequency Identification Sensors: Wireless Long-Range Strain Sensors Using Radio-Frequency Identification [O] . Lijun Teng, Kewen Pan, Markus P. Nemitz, -1

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7. Corrigenda - Solar Radiation at 1200 MC/S., 600 MC/S., and 200 MC/S [O] . FJ Lehany, DE Yabsley 1949

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8. A Frequency-Differential Phase-Shift Keyed Digital Data Modem for Operation at 4800, 2400 1200, and 600 Bits Per Second over Long-Range HF Paths [R] . Porter, G. C., Gray, M. B., Perkett, C. E. 1966

机译：频率差分相移键控数字数据调制解调器，用于在远程HF路径上以每秒4800,2400,1200和600位运行

Some experiments on conducting screens for a U-type spaced-aerial radio direction-finder in the frequency range 600????????1200 Mc/s

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