Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Sonar Transducer Impedance Matching and Tuning

Impedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningTransducer Impedance Matching and TuningImpedance Matching and TuningTransducer Impedance Matching and TuningTransducer Impedance Matching and Tuning

BII-6000 Series   Impedance Matching and Tuning Network

Transducers made from piezoelectric materials transform the electric energy to mechanical energy by converse piezoelectric effect. The impedance of a piezoelectric transducer is frequency-dependent ranging from several kiloohms to several ohms, and is of capacitive, resistive or inductive load to a power amplifier at different frequency ranges. The impedance matching & tuning unit is a necessary device to change the impedance of the transducer in a specific narrow frequency range to meet the load requirements of the power amplifier for maximum and efficient power delivery from the electric to the mechanical.

Sonar Transducer ImpedanceImpedance Matching and Tuning

Besides, BII-6000s also provide wideband performance for SONAR and communication applications where complex waveforms with higher harmonics must be transformed with low distortion.

Underwater transducers (projectors, acoustic sources) are designed to transmit energy efficiently at a particular frequency (resonance) or in its  frequency bandwidth. Therefore, customized BII-6000s are designed for use in this particular frequency (resonance) or frequency bandwidth of the transducers. Please specify the frequency or frequency span when ordering BII-6000.

Product Line Structure Single Frequency
Impedance Matching
Dual Frequency
Impedance Matching
Power Amplifier
Output
BII-6010 Series Single Ended
Input/Output Isolated
30Hz to 10MHz No Single-ended
Differential/Bridge
Half-bridge
H-bridge/Full-bridge
BII-6050 Series Single Ended
Input/Output Isolated
No 5kHz to 1MHz
(200&33kHz, 200&50kHz...)
Single-ended
Differential/Bridge
Half-bridge
H-bridge/Full-bridge
BII-6060 Series Push Pull
Input/Output Isolated
30Hz to 3MHz No Open collector (open drain)
Push-pull
Order Options:
1. Order detached BII-6000 component for use in your Sonar system.
2. Have Benthowave integrate BII-6000 into transducer housing for easy and fast system setup.
How to order BII-6000 series Impedance Matching and Tuning Network
Note: Impedance matching can only be implemented in a narrow frequency range, Please provide us following information:
1. Load requirements of your power amplifier, refer to respective specs, or Specify BII's power amplifier.
2. Admittance of your transducer, refer to respective specs, or Specify BII's transducer.
3. Operating frequency of the transducer, refer to respective specs.
4. Specify housing, cable type, cable length and connector.

Impedance Matching NetworkImpedance Matching and Tuning

Underwater Transducer Underwater Transducer

Features Related Products
Thermally Conductive, Input/Output Isolated Power Amplifiers SONAR / HIFU Transducer
Frequency Range: 30Hz to 10MHz BII-2100 Transmitting & Receiving Switch
Wideband, High Efficiency Underwater Transducers SONAR, HIFU, ...
   
Matching & Tuning Network Matching and Tuning NetworkImpedance Matching and Tuning
BII-6010 Series BII-6010-f-xx-G-B-xx-xx-xx-xx
Type: Single-ended, 2 input/2 output wires
Frequency Range: 30Hz to 10MHz, Single Frequency Impedance Matching & Tuning
Power Capacity: 10W to 2000W
Insulation: > 500MΩ@1000 VDC
Housing: Molded or Metal Housing
Cable: 1. Wires (default)
2. Shielded Cable
3. Coax RG58 (50Ω)
4. Custom
Cable Length: 1. Default: 0.1m
2. Custom
Connector: 1. Default: Wire Leads
2. BNC Male (50Ω) (<50Vrms ONLY)
3. MIL-5015 style
4. Input: Banana Plug, Output: Banana Jack
5. Input: Binding Post, Output: Binding Post
6. Custom
Warning: Connector BNC is for low voltage use ONLY, <50Vrms.
Molded Housing Size: ΦDxH: from 33x20mm to 68.5x140mm, or customized to meet power rating.
Metal Housing Size:
(for above 50kHz)
LxWxH: 115x39x56, 138x61x56 mm or customized to meet power rating.
Four mounting holes.
Weight: 100 to 800 gram
How to order:                
BII-6010 -f -xx -G -B -xx -xx -xx -xx
Single-ended Frequency
in kHz
Target Load in Ω
Power Amplifier Driving
Transducer
Conductance
G in mS
Transducer
Susceptance
B in mS
Housing:
MH: Molded
MH: Metal
Cable Type Cable Length
in m
Connector Type
Example:  
BII-6010-50-5-2.2-1.1-MH-1-0.2-1 BII-6010, 50kHz, 5Ω, Transducer G=2.2mS, B=1.1ms, Molded Housing, Wires, 0.2m, wire leads.
BII-6010-120-6-6.5-3.2-MH-2-0.1-1 BII-6010, 120kHz, 6Ω, Transducer G=6.5mS, B=3.2ms, Molded Housing, Shielded Cable, 0.1m, wire leads.
BII-6010-1000-50-60.6-9.0-MH-3-2-2 BII-6010, 1MHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Molded Housing, RG58 Coax, 2m, BNC.
   
Matching & Tuning Network Matching and Tuning NetworkImpedance Matching and Tuning
BII-6050 Series BII-6050-xx-G/B/f1-G/B/f2-xx-xx-xx-xx
Type: Single-ended, 3 input/2 output wires
Frequency: 5kHz to 1MHz, Dual-Frequency Impedance Matching & Tuning
For example: 200&33kHz, 200&50kHz, 300&50kHz, etc...
Power Capacity: 10W to 2000W
Insulation: > 500MΩ@1000 VDC
Housing: Molded or Metal Housing
Cable: 1. Wires (default)
2. Shielded Cable
3. Coax RG58 (50Ω)
4. Custom
Cable Length: 1. Default: 0.1m
2. Custom
Connector: 1. Default: Wire Leads
2. BNC Male (50Ω) (<50Vrms ONLY)
3. MIL-5015 style
4. Input: Banana Plug,     Output: Banana Jack
5. Input: Binding Post, Output: Binding Post
6. Custom
Warning: Connector BNC is for low voltage use ONLY, <50Vrms.
Molded Housing Size: ΦDxH: from 33x20mm to 68.5x140mm, or customized to meet power rating.
Metal Housing Size:
(for above 50kHz)
LxWxH: 138x61x56 mm
Four mounting holes.
Weight: 100 to 800 gram
How to order:              
BII-6050 -xx -G/B/f1 -G/B/f2 -xx -xx -xx -xx
Single-ended Target Load in Ω
Power Amplifier Driving
Transducer
G&B in mS
at f1 in kHz
Transducer
G&B in mS
at f2 in kHz
Housing:
MH: Molded
MH: Metal
Cable Type Cable Length
in m
Connector Type
Example:  
BII-6050-5-2.2/1.1/50-10.0/5.0/200-MH-2-0.2-1 BII-6050, 5Ω, Transducer G=2.2mS, B=1.1ms at 50kHz, Transducer G=10.0mS, B=5.0ms at 200kHz, Molded Housing, Shielded Cable, 0.2m, wire leads.
BII-6050-6-1.8/1.0/33-15.0/8.0/300-MH-2-0.2-1 BII-6050, 6Ω, Transducer G=1.8mS, B=1.0ms at 33kHz, Transducer G=15.0mS, B=8.0ms at 300kHz, Molded Housing, Shielded Cable, 0.2m, wire leads.
   
Matching & Tuning Network Matching and Tuning NetworkImpedance Matching and Tuning
BII-6060 Series BII-6060-f-xx-G-B-xx-xx-xx-xx
Type: Push-pull Centre-tapped, 3 input/2 output wires
Frequency: 30Hz to 3MHz, Single Frequency Impedance Matching & Tuning
Power Capacity: 10W to 2000W
Insulation: > 500MΩ@1000 VDC
Housing: Molded or Metal Housing
Cable: 1. Wires (default)
2. Shielded cable
3. Coax RG58 (50Ω)
4. Custom
Cable Length: 1. Default: 0.1m
2. Custom
Connector: 1. Default: Wire Leads
2. BNC Male (50Ω) (<50Vrms ONLY)
3. MIL-5015 style
4. Input: Banana Plug, Output: Banana Jack
5. Input: Binding Posts, Output: Binding Post
6. Custom
Warning: Connector BNC is for low voltage use ONLY, <50Vrms.
Molded Housing Size: ΦDxH: from 33x20mm to 68.5x140mm, or customized to meet power rating.
Metal Housing Size:
(for above 50kHz)
LxWxH: 115x39x56, 138x61x56 mm or customized to meet power rating.
Four mounting holes.
Weight: 100 to 800 gram
How to order:                
BII-6060 -f -xx -G -B -xx -xx -xx -xx
Single-ended Frequency
in kHz
Target Load in Ω
Power Amplifier Driving
Transducer
Conductance
G in mS
Transducer
Susceptance
B in mS
Housing:
MH: Molded
MH: Metal
Cable Type Cable Length
in m
Connector Type
Example:  
BII-6060-50-5-2.2-1.1-MH-1-0.2-1 BII-6060, 50kHz, 5Ω, Transducer G=2.2mS, B=1.1ms, Molded Housing, Wires, 0.2m, wire leads.
BII-6060-120-6-6.5-3.2-MH-2-0.1-1 BII-6060, 120kHz, 6Ω, Transducer G=6.5mS, B=3.2ms, Molded Housing, Shielded Cable, 0.1m, wire leads.
BII-6060-1000-50-60.6-9.0-MH-3-2-2 BII-6060, 1MHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Molded Housing, RG58 Coax, 2m, BNC.

Wiring

Molded Unit With Wires

Device Primary + Primary - Center Tap Secondary + Secondary -
Single-ended Yellow Black N/A Red Blue
Push-Pull Yellow Black White Red Blue

Molded Unit with RG58 Coax/BNC and Metal Housing with Binding post

Signals Molded Unit (RG58 Coax/BNC) Metal Housing with Binding Post
Signal from Power Amplifier Coax Cable with Label "I" PA Binding Post:
Signal to Sonar/HIFU Transducer Coax Cable with Label "O" Transducer Binding Post

Molded Unit with RG58 Coax/BNC and Shielded Cable/MIL-5015 Connector (Female)
Signal from Power Amplifier Signal to Sonar/HIFU Transducer
Coax RG58/BNC (male) Shielded Cable/MIL-5015 Connector (Female)
Coax Conductor: Signal
Coax Shield: Common/Grounding
Receptacle A: Common/Grounding; Shield of Cable.
Receptacle B: To Transducer -; Black Wire of Cable.
Receptacle C: to Transducer +; Red Wire of Cable.

Molded Unit with Shielded Cable/MIL-5015 Connector (Male) and Shielded Cable/MIL-5015 Connector (Female)
Signal from Power Amplifier Signal to Sonar/HIFU Transducer
Shielded Cable/MIL-5015 Connector (Male) Shielded Cable/MIL-5015 Connector (Female)
Pin A: Common/Grounding; Shield of Cable.
Pin B: from Out - of Power Amplifier; Black Wire of Cable.
Pin C: from Out + of Power Amplifier; Red Wire of Cable.
Receptacle A: Common/Grounding; Shield of Cable.
Receptacle B: To Transducer -; Black Wire of Cable.
Receptacle C: to Transducer +; Red Wire of Cable.

Sonar Transducer Impedance Matching and Tuning

Technical Notes

Networks used for coupling piezoelectric SONAR transducers to electronic power amplifiers may be categorized into two general types. The first and simplest of these is to correct the power factor of the piezoelectric transducers. The second and complex one is used to transform transducers' impedance to a higher or lower value.

The design of power factor correction network is quite straightforward. Engineering details (Q, magnetic material, insulation, power rating, characterization of SONAR transducers, etc.) need to be taken into account to make a successful correction network.

If a change in the impedance magnitude is desired in addition to the power factor correction of the transducers, it is necessary to design an electronic network with the tuning inductor. For inductive components to be used in audio and ultrasonic ranges, special cares have to be taken for manufacturing high value inductors and transformers with proper size, cost, losses, bandwidth, power capability and so on.

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