Dielectric antenna element for GPS DAKC series Antenna electrode 給電点 アンテナ電極 4 1.9 0.5 Max. Feeding point 誘電体セラミックス 25.0 Dielectric ceramics 1.7 25.0 φ0.8 3.3 3-R0.5 C2 Unit : mm Features • Compact, low-profile. • Rectangular microstrip structure, offset single feed through ground plane and dielectric substrate. • Use of low temperature coefficient ceramics gives stability under changing temperature conditions. • Antenna electrodes made of silver for excellent high frequency characteristics. • 小型、低背 • 方形マイクロストリップ構造、オフセット一点給電方式 • 低温度係数セラミックス使用により温度変化に対して安定 • アンテナ部電極は、高周波特性に優れた銀電極 Electrical characteristics TOKO Part number DAKC1575MS74 Range of receiving frequency (MHz) 1575.42 ±1.023 Center frequency (MHz) Bandwidth (MHz) Min. 1580.5 ※2 9.0 Gain Gain (Zenith90˚) (10˚ Elevation) (dBi) Typ. (dBi) Typ. +5.0 –1.0 Impedance (Ω) Frequency temperature coefficient (ppm/˚C) Max. 50.0 20.0 ※1 Above table shows characteristics measured with 70mm square GND plane. 上表の電気特性は70mm口グランド板に装着時のものです。 ※2 When covered with the radome, then in general the shift in the center frequency is set so that it will be lower by approximately 5MHz. レドームを被せた時、一般的に中心周波数は5MHz程低い方に移動するのを見込んで設定しています。 continued on next page 次頁へ続く Dielectric antenna element for GPS continued from previous page 前頁より続く Electrical characteristics Directivity chart Return loss characteristics CH1 S11 log MAG 5dB/REF 0dB 1:−29.664dB 30 1580.5MHz BW:25.4MHz cent:1.580.4MHz G:62.127 1loss:−29.664dB Cor 00 330 3 6 10 300 60 15 20 DAKC1575MS74 with 70×70mm GND plane 25 270 90 4 3 240 120 1 2 CENTER:1575.0MHz 150 180 210 SPAN:200.0MHz Note : Fixing the Antenna (Part Number:DAKC1575MS74T) Use of a double-faced adhesive tape on the grounding plate is recommended. On order, it is possible for TOKO to attach such tape before shipment. 30 (Part Number:DAKC1575MS74T) (注) アンテナの固定について グランド基板に装着する際は両面接着テープによる装着を推奨 致します。 また弊社にて両面接着テープを貼付して出荷することも可能で す。 00 330 3 6 10 300 60 15 20 25 270 90 240 120 150 180 210 TX : Right Hand Circular Polalized Signal Frequency = 1580.5MHz Measured with 70mm sq. ground plane
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