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請教英文高手一段英文翻譯!感謝!20點

Fig. 5 shows the result of measuring the radiation pattern.

With the flat antenna, the H-plane (y-z plane) shows an omnidirectional

pattern and the maximum gain was -4dBd (Fig. 5a).

With the U-bent antenna, the H-plane (y-z plane) maintained

the omni-directional characteristic and the E-plane (x-z plane)

showed a little gain increase at the 90 deg., but by and large

maintained the characteristic of the flat antenna. The

maximum gain was -5dBd (Fig. 5b). The characteristic of the

antenna bent and worn on the wrist was measured in two

cases: one where the antenna was placed on the side of the

waist (Case I), and the other where the wrist was placed in

front of the stomach (Case II). As a result of the

measurements, in Case I, there appeared a radiation

characteristic that was less affected by the human body. In

Case II, the characteristic obtained was one which the back

lobe was suppressed by the effect of the human body.

However the gain at the 0 deg. was -7.5 dBd in both cases

(Fig. 5c).

This study has proposed a wrist-wearable antenna for the

UHF band RFID system. It was designed as a low-profile

antenna with a ground plane in order to minimize the effect by

the human body and improve its wearability. For impedance

matching, a flat stub antenna was used, which was reduced in

size to 15mm wide, 100mm long, and 0.6mm high. With the

antenna worn on the wrist, there was little change in the

resonant frequency and the maximum gain was -7.5dBd.

Those results confirm that the MLMA suggested by this study

is appropriate for a wrist wearable antenna for the UHF band.

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  • 月餅
    Lv 7
    9 年前
    最佳解答

    圖 5 顯示了測量輻射模式的結果。

    在平坦的天線與高平面 (y-z 平面) 顯示了一個全方位

    模式和最大的收穫是-4dBd (圖 5a)。

    與你彎曲天線司長H-飛機 (y-z 平面) 保持

    全方位特性和電子平面 (x-z 平面)

    有點增益上升在 90 度,但大體上

    保持平面天線的特性。 在

    最大的收穫是-5dBd (圖 5b)。 特點,

    天線彎曲和戴在手腕上的測量值是在兩個

    例: 一側的放置天線,

    腰 (案例我),和其他的手腕被放置在

    前面的胃 (例二)。 結果的

    案例中的測量我,出現了一個輻射

    不受人體的特性。 在中

    案件第二獲得的特點是,背面

    葉,抑制了人體的影響。

    但是在 0 增益度百分率是阻擋這兩種情況

    (圖 5 c)。 這項研究提出了一個手腕耐磨天線,

    UHF 頻段 RFID 系統。 它被設計為一個低設定檔

    為了儘量減少的影響的地面天線

    人的機構和提高其耐磨性。 阻抗

    匹配,平存根 (stub) 天線使用,這在減少

    調整大小以 15 毫米寬,100 毫米 (長,和高 0.6 毫米)。 與在戴在手腕上的天線有多大變化,

    共振頻率和最大的收穫是-7.5dBd。

    這些結果證實,MLMA 提出這項研究

    適合的 UHF 頻段的腕關節可穿戴天線。

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