The Beidou antenna

External antenna for the third generation of Beidou、B3/B2/B1/S/G1 Lf1 to Lf4

External antenna for the third generation of Beidou、B3/B2/B1/S/G1 Lf1 to Lf4

B3/B2/B1/S/G1 Lf1 to Lf4
5M~50M
Product description: External antenna for the third generation of Beidou、B3/B2/B1/S/G1 Lf1 to Lf4
INQUIRY

I. Overview

² This compact multi-frequency external antenna supports the Beidou-3 satellite system, designed to meet the communication needs of Beidou mobile terminals and vehicle-mounted systems, including both transmission and reception across all frequency bands.

² The product features stable and reliable performance, high power capacity, and low insertion loss, which can meet the working needs of large current of transmitting signal. The antenna power amplifier part has power detection function, which can effectively reduce power consumption and prolong the standby time of mobile terminal when not transmitting signal.

2、technical requirement

This antenna supports B1I, B1C, B1A, B2a, B2b, B3I, B3Q, B3A, B3AE, S2C, S2A, S1I/Q, and G1 reception, and is compatible with dual-mode Beidou antennas transmitting Lf1 to Lf4.

This antenna has the function of resisting damage from high power microwave: the antenna port can withstand the continuous wave signal radiation of 10W power, the antenna does not burn out, and it can be automatically restored after the high power signal disappears.

2.1 Technical requirements for receiving antennas

order number	test item	Receiver antenna (B1C)	Receiver antenna (B3)	Receiver antenna (B2a)	Receiver antenna (B2b)	receiving antenna （S）
1	service frequency	1575.42MHz ±16.368MHz	1268.52MHz ±10.23MHz	1176.25MHz ±10.23MHz	1207.14MHz ±10.23MHz	2491.75MHz ±8.16MHz
2	Polarization gain	≥3.0dBic (normal) ≥1dBic (仰角≥70°) ≥-3dBic (仰角≥30°)	≥3dBic (normal) ≥1dBic (仰角≥70°) ≥-3dBic (仰角≥30°)	≥3dBic (normal) ≥1dBic (仰角≥70°) ≥-3dBic (仰角≥30°)	≥3dBic (normal) ≥1dBic (仰角≥70°) ≥-3dBic (仰角≥30°)	≥3.5dBic (normal) ≥2dBic (仰角≥70°) ≥-3dBic (back angle ≥ 30°)
3	Polarization method	right-handed circular polarization
	beam pattern	Azimuth 0°~360°, pitch 10°~90°
3	axial ratio	≤3dB (normal)
4	Output standing wave	≤1.5 (50Ω)
5	front-to-back ratio	≥20dB
6	Send/Receive Isolation	≥10 dB (B1 and L); ≥18dB (B3, B2a, B2b, S, and L)

2.2 LNA Requirements for Receiving Antennas

order number	test item	receiving antenna
1	service frequency	Beidou B1(B1I, B1C, B1A):1575.42MHz±16.368MHz; Beidou B2a:1176.45MHz±10.23MHz; BeiDou B2b:1207.14MHz±10.23MHz; BeiDou B3(B3I, B3Q, B3A, B3AE):1268.5MHz±10.23MHz BeiDou S(S2C, S2A, S1I/Q):2491.75MHz±8.16MHz; GLONASS G1:1602MHz±3.9375MHz
2	LNA gain	35-40dB
3	burn-out resistance	Continuous wave resistance: ≥10W (40dBm)
4	antenna impedance	50Ω
5	Output standing wave	≤2.0
6	noise factor	≤2.0dB
7	Fire resistance power	≥5W（37dBm）
8	Anti-frequency interference capability	In-band ≥-119dBm/MHz, transition band ≥-86dBm/MHz(30MHz,2500MHz~2530MHz,2453.5MHz~2483.5MHz; out-of-band ≥-53dBm/MHz.
9	Bandpass suppression	＞50dB@1268.52±30MHz；＞50dB@1575.42±50MHz；＞50dB@2491.75±30MHz； >50dB@1610-1628MHz@B3/B2b/S/B1/B2a

2.3 Technical requirements for transmitting antenna

order number	test item	transmitting antenna （L）
1	service frequency	LF1：1614.26MHz±4.08MHz ；LF2：1618.34MHz±4.08MHz； LF3：1622.4MHz2±4.08MHz ；LF4：1624.524MHz±1.6376MHz
2	Polarization method	left-hand circular polarization
3	beam pattern	Azimuth 0°~360°, elevation 10°~90°
4	Polarization gain	≥-4dBic (仰角≥30°); ≥0dBic (仰角≥50°); ≤5.5dBic (normal)
5	out-of-roundness	≤2dB (仰角≥20°)
6	axial ratio	≤3dB (normal)
7	Output standing wave	≤1.5 (50Ω)

2.4 PA Requirements for Transmission Antenna

order number	test item	transmitting antenna （L）
1	frequency	LF0：1615.68MHz±4.08MHz ；LF1：1614.26MHz±4.08MHz ； LF2：1618.34MHz±4.08MHz ；LF3：1622.42MHz±4.08MHz ； LF4：1624.524MHz±1.6376MHz
2	interiorinput power	-5 dBm~+5dBm
3	output power	≥37dBm (typical input value of 0dBm)
4	Output power variation	≤1.5dB (high and low temperature data compared to room temperature)
5	Enter standing wave	≤2.0
	Power amplifier activation method	Power detection method
6	Gain level	-15dBm
	Bandpass suppression	≥40dBc（1258MHz~1278MHz）；≥15dBc（1559MHz~1578MHz）
7	working voltage	5V
8	working current	Receive: ≤70mA; transmit: ≤3000mA

2.5 Environmental Adaptability

order number	test item	Test requirements
1	working temperature	-40 to +55°C; in accordance with GJB 150.4A-2009 requirements
2	Storage temperature	-55 to +70°C; in accordance with GJB 150.3A-2009 requirements

2.6 Mechanical properties

order number	project	ask
1	Antenna size	Φ 118*60mm, see Figure 1 for the shape and size of the antenna
2	Output connector	TNC（K）
3	antenna housing	ABS+PC
4	Antenna color	Brown-green (matte), color code GY05
5	Antenna weight	≤0.8kg