MEDIATEK MT3620, Hardware User'S Manual

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MT3620
Hardware User Guide
MediaTek Confidential
©
2020 MediaTek Inc. Page 35 of 40
This document contains information that is proprietary to MediaTek Inc. Unauthorized reproduction or disclosure
of this information in whole or in part is strictly prohibited.
10.1.2 Diplexer

The dimension of diplexer is 1608 type which should have enough out-of-band rejection to
attenuate 2
nd
harmonic and VCO leakage of 2.4GHz and 5GHz signals.

The diplexer MTK recommends should have electrical charateristics as per the following table.
No. Pin Definition No Pin Definition
1 Low Band Port 3 High Band Port
2 Common Port 4 GND
Parameter MTK Spec. Min Typ. Max. Unit
Port Impedance
Low Band Port impedance 50 Ohm
High Band Port impedance 50 Ohm
ANT Port 50 Ohm
Passband Frequency Range
Low Band Port 2400 2500 MHz
High Band Port 4900 5950 MHz
Insertion Loss
Low Band Port 0.8 dB
High Band Port 0.9 dB
Low Band Port
Attenuation
4800 – 6000MHz 20 dB
7200 – 7500MHz 20 dB
High Band Port
Attenuation
1800 – 2500MHz 20 dB
3600 – 3900MHz 10 dB
9800 – 11900MHz 20 dB
Qualified Diplexer list:
Component Part Number Manufacturer
Size
(mm
2
)
Status
Temp.
(C)
2.4/5GHz DPX DP1608-A2455SC ACX 1608 Approval
-10~
+70
2.4/5GHz DPX DPX165950DT-
8018A1
TDK 1608 Approval
-10~
+70