Dielectric antenna elements for GPS

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。
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Dielectric antenna element for GPS
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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