Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC.          Underwater Acoustics

Sonar Transducer Impedance Matching and Tuning

Sonar Transducer Impedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance Matching and Tuning

BII-6000    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. A impedance matching/tuning unit is necessary to change the impedance of the transducer to meet the load requirements of the power amplifier for maximum and efficient power delivery from the electric to the mechanical.

Besides, components BII-6000 are designed to 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.

How to choose output type of a power amplifier to work with BII-6000 series:

Output Type of Power Amplifier BII-6000 Standard BII-6000 Push-pull Type
Single-ended output OK
No
Differential/Bridge Mode Output OK No
Half-bridge Output OK No
H-bridge/Full-bridge Output OK No
Open collector (open drain) Push-pull No OK

Order Options:
1. Order the BII-6000 component to be integrated into your Sonar system by yourself for flexibility.
2. Have Benthowave integrate BII-6000 into transducer housing for easy and fast system setup.

Custom Design of BII-6000
Please provide us following information for customized BII-6000 series:
1. Load requirements of your power amplifier.
2. One of following parameters of your transducer.
3. Operating frequency or bandwidth of the transducer.
4. Customized size requirements if any.

Equivalent Circuit Complex Impedance Admittance
C0, Cm, Lm, Rm+Rw
Testing Frequency
Z = |Z|∠θ  or Z = R + jX, Testing Frequency
Z - Complex Impedance; |Z| - Magnitude; θ - Phase;
R - Resistance; X - Reactance.
Y = G + jB, Testing Frequency
Y - Admittance; G - Conductance; B - Susceptance.

 

Impedance Matching Network    Impedance Matching and Tuning

Underwater Transducer Underwater Transducer

Features Related Products

Electromagnetic Shielded, Thermally Conductive, Input/Output Isolated
Parallel/Series/Hybrid Matching & Tuning, Frequency Range: 30Hz to 3MHz
Wideband, Convert electrical energy to mechanical energy efficiently

Power Amplifiers SONAR / HIFU Transducer
BII-2100 Transmitting & Receiving Switch
Underwater Transducers : SONAR, HIFU, ...


BII-6010 Series BII-6011 BII-6012
Type: 2 input/2 output wires Push-pull Centre-tapped
3 input/2 output wires
Frequency: 30Hz to 50kHz 30Hz to 50kHz
Power: < 250 W < 250 W
Insulation: > 500 MΩ @1000 VDC
Housing: Metal Housing
Cable: Wires
Cable Length: 1. Default: 0.2m
2. Custom
Connector: 1. Default: Wire Leads
2. BNC Male (for low voltage use ONLY <36V)
3. MIL-5015 style
4. Input: Banana Plug; Output: Banana Jack
5. Custom
Size: LxWxH Customized to meet power specs Four mounting holes.
Note: Please specify the size requirements when ordering if your project has limited size available for the units. The BII-6000s' size shown in the respective specs is the ones for most transducers, but BII-6000s' size may vary according to the specific transducers and power amplifiers.

Matching & Tuning Network Matching and Tuning NetworkImpedance Matching and Tuning
BII-6020 Series BII-6021 BII-6022 BII-6023 BII-6024
Type: 2 input/2 output wires 2 input/2 output wires Push-pull Centre-tapped
3 input/2 output wires
Push-pull Centre-tapped
3 input/2 output wires
Frequency: 5kHz to 1MHz 5kHz to 1MHz 5kHz to 1MHz 5kHz to 1MHz
Power: < 2000 W < 2000 W < 2000 W < 2000 W
Insulation: > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC
Housing: Molded Metal Housing Molded Metal Housing
Cable: 1. Wires (default)
2. Shielded Cable
3. Coax RG58
4. Custom
N/A 1. Wires (default)
2. Shielded cable
3. Coax RG58
4. Custom
N/A
Cable Length: 1. Default: 0.1m
2. Custom
N/A 1. Default: 0.1m
2. Custom
N/A
Connector: 1. Default: Wire Leads
2. BNC Male (<36V ONLY)
3. MIL-5015 style
4. Input: Banana Plug
    Output: Banana Jack
5. Custom
Input: Binding Post
Output: Binding Post
1. Default: Wire Leads
2. BNC Male (<36V ONLY)
3. MIL-5015 style
4. Input: Banana Plug
    Output: Banana Jack
5. Custom
Input: Binding Posts
Output: Binding Post
Size: ΦDxH:
69 x 42 mm
69 x 48 mm
LxWxH:
138 x 61 x 56 mm
Four mounting holes.
ΦDxH
69 x 42 mm
69 x 48 mm
LxWxH:
138 x 61 x 56 mm
Four mounting holes.
BII-6030 Series BII-6031 BII-6032 BII-6033 BII-6034
Type: 2 input/2 output wires 2 input/2 output wires Push-pull Centre-tapped
3 input/2 output wires
Push-pull Centre-tapped
3 input/2 output wires
Frequency: 100kHz to 3MHz 100kHz to 3MHz 100kHz to 3MHz 100kHz to 3MHz
Power: < 2000 W < 2000 W < 2000 W < 2000 W
Insulation: > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC
Housing: Molded Metal Housing Molded Metal Housing
Cable: 1. Wires (default)
2. Shielded Cable
3. Coax RG58
4. Custom
N/A 1. Wires (default)
2. Shielded cable
3. Coax RG58
4. Custom
N/A
Cable Length: 1. Default: 0.1m
2. Custom
N/A 1. Default: 0.1m
2. Custom
N/A
Connector: 1. Default: Wire Leads
2. BNC Male (<36V ONLY)
3. MIL-5015 style
4. Input: Banana Plug
    Output: Banana Jack
5. Custom
Input: Binding Post
Output: Binding Post
1. Default: Wire Leads
2. BNC Male (<36V ONLY)
3. MIL-5015 style
4. Input: Banana Plug
    Output: Banana Jack
5. Custom
Input: Binding Posts
Output: Binding Post
Size: ΦDxH:
33 x 20 mm
33 x 30 mm
42 x 20 mm
42 x 30 mm
Custom to transducer
LxWxH:
115 x 39 x 56 mm
Four mounting holes.
ΦDxH
33 x 20 mm
33 x 30 mm
42 x 20 mm
42 x 30 mm
Custom to transducer
LxWxH:
115 x 39 x 56 mm
Four mounting holes.
BII-6040 Series BII-6041 BII-6042 BII-6043 BII-6044
Type: 2 input/2 output wires 2 input/2 output wires Push-pull Centre-tapped
3 input/2 output wires
Push-pull Centre-tapped
3 input/2 output wires
Frequency: 5kHz to 5MHz 5kHz to 5MHz 5kHz to 5MHz 5kHz to 5MHz
Power: < 500 W < 500 W < 500 W < 500 W
Insulation: > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC > 500 MΩ @1000 VDC
Housing: Molded Metal Housing Molded Metal Housing
Cable: 1. Wires (default)
2. Shielded Cable
3. Coax RG58
4. Custom
N/A 1. Wires (default)
2. Shielded cable
3. Coax RG58
4. Custom
N/A
Cable Length: 1. Default: 0.1m
2. Custom
N/A 1. Default: 0.1m
2. Custom
N/A
Connector: 1. Default: Wire Leads
2. BNC Male (<36V ONLY)
3. MIL-5015 style
4. Input: Banana Plug
    Output: Banana Jack
5. Custom
Input: Binding Post
Output: Binding Post
1. Default: Wire Leads
2. BNC Male (<36V ONLY)
3. MIL-5015 style
4. Input: Banana Plug
    Output: Banana Jack
5. Custom
Input: Binding Posts
Output: Binding Post
Size: ΦDxH:
48 x 28 mm
48 x 43 mm
Custom to transducer
LxWxH:
138 x 61 x 56 mm
Four mounting holes.
ΦDxH
48 x 28 mm
48 x 43 mm
Custom to transducer
LxWxH:
138 x 61 x 56 mm
Four mounting holes.
Warning: Connector BNC is for low voltage use ONLY, <36V.

Wiring

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

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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