How to choose a 2.4GHz 5dBi Antenna for FTTH terminal

Specs of FTTH equipment external antenna

  Today, FOT Blog is going to share how to choose a external antenna for PON ONU/FTTH equipment terminal, in specifications details. This specification defines the reliability test performance characteristics, radiation pattern, S parameter test data and Packing Criterion for FTTH equipment type external antenna.

This is what a 2.4GHz 5dBi Antenna looks like

This is what a 2.4GHz 5dBi Antenna looks like

Specification of external antenna

A. Electrical Characteristics 
Frequency2400~2500 MHz
S.W.R.<= 2.0
Antenna Gain5.0dBi
PolarizationLinear
Impedance50 Ohm
B. Material & Mechanical Characteristics
Material of RadiatorCu
Material of PlasticBody1: TPEE
Body2: ABS
Body3: PC
Cable TypeRG- 113
C. Environmental
Operation Temperature- 40 ˚C ~ + 65 ˚C
Storage Temperature- 40 ˚C ~ + 80 ˚C

Characteristics and Reliability Test of antenna

Test Items Test Condition and ProcedureRequirements
C1S.W.R.Set DUT on Network Analyzer; make individual calibration to testDirective DUT specification
C2Antenna GainSet DUT on Antenna Chamber; make individual calibration to testDirective DUT specification
M1VibrationMIL-STD-202G, 201A1.  No Visual   Damage
Amplitude: 0.03 inch (0.76mm); Freq: 10 to 55 Hz 3 directions; 2 hours for each direction2.  Frequency Tol.<=   5%
M2Random DropHeight: 1.5 Meter;1.  No parts   separated
3 directions; 1 time for each direction2.  Frequency Tol.<=   5%
M3SolderabilityMIL-STD-202G, 210F, cond. A1.  Mounted on   PCB
Solder iron: 350±10°C; Duration: 5 seconds2.  No Visual   Damage
M4Terminal- Pull TestMIL-STD-202G, 211A, cond. A1.  Directive DUT   specification
Holding with individual specification; force applied to axis of terminal2.  Frequency Tol.<=   5%
M5Terminal- Torque TestMIL-STD-202G, 211A, cond. E1.  Directive DUT   specification
Holding with individual specification; applied clockwise and counterclockwise to the axis of terminal2.  Frequency Tol.<=   5%
M6DimensionInspection of dimension, color, material, package, surface processDirective DUT specification
E1Salt SprayMIL-STD-202G, 101E, cond. BAfter 2 Hours Recovery
Temp: 35°C; RH: >= 95%; NaCl solution: >= 5%; Time: 48 hours1.  No Visual   Damage
2.  Frequency Tol.<=   5%
E2HumidityMIL-STD-202G, 103B, cond. BAfter 2 Hours Recovery
Temp: 40°C; RH: >= 95%; Time: 48 hours1.  No Visual   Damage
2.  Frequency Tol.<=   5%
E3Thermal Shock1 Cycle: - 40°C (30 minutes) to + 80°C (30 minutes) Cycles: 24After 2 Hours Recovery
1.  No Visual   Damage
2.  Frequency Tol.<=   5%
E4Life (High Temp.)MIL-STD-202G, 108A, cond. AAfter 2 Hours Recovery
Temp: 85°C; Time: 96 hours1.  No Visual   Damage
2.  Frequency Tol.<=   5%
R1RoHSWith Reference to IEC 62321:2008 with flow chartDirective RoHS 2002/95/EC
R2PFOSWith Reference to USA EPA 3540C:1996 by LC/MSDirective RoHS 2006/122/EC
R3PFOAWith Reference to USA EPA 3540C:1996 by LC/MSDirective RoHS 2006/122/EC

Antenna – S Parameter Test Data

Antenna S Parameter Test Data

Antenna S Parameter Test Data

Antenna – Radiation Pattern Test Data

  • Frequency (MHz)   2400.0   2450.0    2500.0
  • Efficiency (%)         77.90       75.10       75.00
  • Gain (dBi)               4.25         4.62         4.32
Antenna Radiation Pattern Test Data

Antenna Radiation Pattern Test Data

Mechanical Drawing See attached files

  • No.   Name         Material   Colour   Q’ty
  • 1        Body 1        TPEE        White     1
  • 2       Body 2        ABS           White     1
  • 3       Body 3        PC              White     1
  • 4       Cable          OD1.13,      Gray      1
  • 5        I-PEX         Cu                             1
  • 6       Hinge Pin   Pom        White      2
Note:
1.Dimension: Take * is the important dimension
2.Tolerance: Unmarked tolerance please refer to the standard tolerance

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