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 kΩ to several Ω, 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.  Impedance matching and tuning can only be implemented in a narrow frequency range, generally around resonant frequency of the transducer.

In certain frequency ranges and piezoelectric materials, the transducers' capacitance C0 has little effect on power factor, or the tuning out of C0 becomes forbiddingly difficult, the impedance matching only (not tuning out C0) is preferred for the transmission of maximum electrical power from power amplifiers to transducers.

Transducer Performance Variation with BII-6000 series Impedance Matching and Tuning Network
Parameter Transducer with BII Impedance Matching and Tuning Transducer with BII Impedance Matching ONLY
TVR: Changed, TVR is increased by the factor of the network gain. Changed, TVR is increased by the factor of the network gain.
TVR Bandwidth: No change No change
OCV/Sensitivity: Changed, OCV or receiving sensitivity is attenuated by the factor of the network gain.
Note: With built-in BII-2100 series TR switch, OCV/sensitivity of the transducer is not affected by the network.
Changed, OCV or receiving sensitivity is attenuated by the factor of the network gain.
Note: With built-in BII-2100 series TR switch, OCV/sensitivity of the transducer is not affected by the network.
OCV Bandwidth: Changed, wider/broader bandwidth around resonant frequency or tuning frequency.
Note: With built-in BII-2100 series TR switch, OCV bandwidth of the transducer is not affected by the network.
No change.
Power Factor: Increase to 0.85 ~ 1 at resonant frequency No change.
Note: "No Change" means that the parameter of the transducer with built-in BII-6000 series is same to the one of the transducer without built-in BII-6000 series.
   
Benthowave stocks following cables:  
Cable Nominal Impedance
RG58 Coax 50 Ω
Shielded Cable, Two Conductors 67 Ω
Shielded Cable, Two Conductors 90 Ω

The following graphs show impedance vs. frequency of typical piezoelectric transducers and insertion loss of a customized BII-6000.

Impedance Matching and TuningSonar Transducer Impedance Matching and Tuning

Product Structure Single Frequency
Impedance Matching
Dual Frequency
Impedance Matching
Power Amplifier Output
BII-6010 Single Ended
Input/Output Isolated
30Hz to 10MHz No Single-ended
Differential/Bridge
Half-bridge
H-bridge/Full-bridge
BII-6050 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 Push Pull
Input/Output Isolated
30Hz to 3MHz No Open collector (open drain)
Push-pull

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 Matching and Tuning NetworkImpedance Matching and Tuning
Network BII-6010 BII-6050 BII-6060
Type: Single-ended
2 input/2 output wires
Single-ended
3 input/2 output wires
Push-pull Centre-tapped
3 input/2 output wires
Available Frequency: 30Hz to 10MHz 5kHz to 1MHz 30Hz to 3MHz
Impedance Matching
& Tuning
Single Frequency Dual-Frequency
For example: 200&33kHz, 200&50kHz, 300&50kHz, etc...
Single Frequency
Power Capacity: 10W to 2000W
Insulation: > 500MΩ@1000 VDC
Housing: 1. Molded (MD)
2. Metal (MT)
Cable Length: 1. Default: 0.1m
2. Custom
Cable: 1. Wires (default) (WR)
2. Shielded Cable  (SC)
3. Coax RG58 (50Ω) (RG58)
4. Custom (custom)
Connector: 1. Default: Wire Leads (WL)
2. MIL-5015 style (5015)
3. BNC Male (50Ω) (<50Vrms ONLY) (BNC)
4. Input: Banana Plug, Output: Banana Jack (BPBJ)
5. Input: Binding Post, Output: Binding Post (BPBP)
6. Custom (custom)
Warning: Connector BNC is for low voltage use ONLY, <50Vrms. It is buyer's sole responsibility to make sure that the (female) BNC shield of the signal source is  firmly grounded for operating safety before hooking up this device to the signal source.
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 Cable Length
in m
Cable Connector
BII-6010 -f -xx /xxxx -xx -xx -xx -xx
Single-ended Frequency
in kHz
Target Load in Ω
Power Amplifier Driving
BII-Transducer Part Number
Housing Cable Length
in m
Cable Connector
BII-6010 /xxxx /xxxx -xx -xx -xx -xx
Single-ended BII Power Amplifier Part Number BII Transducer Part Number
Housing Cable Length
in m
Cable Connector
Example of Part Number: Description
BII-6010-50-5-2.2-1.1-MD-0.2-WR-WL BII-6010, 50kHz, 5Ω, Transducer G=2.2mS, B=1.1ms, Molded Housing, 0.2m Wires, Wire Leads.
BII-6010-120-6-6.5-3.2-MD-0.1-SC-WL BII-6010, 120kHz, 6Ω, Transducer G=6.5mS, B=3.2ms, Molded Housing, 0.1m Shielded Cable, Wire Leads.
BII-6010-1000-50-60.6-9.0-MD-2-RG58-BNC BII-6010, 1MHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Molded Housing, 2m RG58 Coax, BNC.
BII-6010-70-50/BII-7565-MD-0.1-SC-WL BII-6010, 70kHz, 50Ω, BII-7565 Transducer, Molded Housing, 0.1m Shielded Cable, Wire Leads.
BII-6010/BII-5021/BII-7565-MD-0.1-SC-WL BII-6010, Impedance Matching between BII-5021 Power Amplifier and BII-7565 Transducer, Molded Housing, 0.1m Shielded Cable, Wire Leads.
   
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 Length
in m
Cable Connector
BII-6050 -xx /xxxx -xx -xx -xx -xx
Single-ended Target Load in Ω
Power Amplifier Driving
BII Transducer Part Number Housing:
MH: Molded
MH: Metal
Cable Length
in m
Cable Connector
BII-6050 /xxxx /xxxx -xx -xx -xx -xx
Single-ended BII Power Amplifier Part Number BII Transducer Part Number Housing:
MH: Molded
MH: Metal
Cable Length
in m
Cable Connector
Example of Part Number: Description
BII-6050-5-2.2/1.1/50-10.0/5.0/200-MD-0.2-SC-WL BII-6050, 5Ω, Transducer G=2.2mS, B=1.1ms at 50kHz, Transducer G=10.0mS, B=5.0ms at 200kHz, Molded Housing, 0.2m Shielded Cable, Wire Leads.
BII-6050-6-1.8/1.0/33-15.0/8.0/300-MD-0.2-SC-WL BII-6050, 6Ω, Transducer G=1.8mS, B=1.0ms at 33kHz, Transducer G=15.0mS, B=8.0ms at 300kHz, Molded Housing, 0.2m Shielded Cable, Wire Leads.
BII-6050-67/BII-7562/50-MD-0.2-SC-WL BII-6050, 67Ω, BII-7562/50 Transducer, Molded Housing, 0.2m Shielded Cable, Wire Leads.
BII-6050/BII-5101/BII-7562/50-MD-0.2-SC-WL BII-6050, Impedance Matching between BII-5101 Power Amplifier and BII-7562/50 Transducer, Molded Housing, 0.2m Shielded Cable, Wire Leads.
   
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 Length
in m
Cable Connector
BII-6060 -f -xx /xxxx -xx -xx -xx -xx
Single-ended Frequency
in kHz
Target Load in Ω
Power Amplifier Driving
BII Transducer Part Number Housing:
MH: Molded
MH: Metal
Cable Length
in m
Cable Connector
Example of Part Number: Description
BII-6060-50-5-2.2-1.1-MD-0.2-WR-WL BII-6060, 50kHz, 5Ω, Transducer G=2.2mS, B=1.1ms, Molded Housing, 0.2m Wires, Wire Leads.
BII-6060-120-6-6.5-3.2-MD-0.1-SC-WL BII-6060, 120kHz, 6Ω, Transducer G=6.5mS, B=3.2ms, Molded Housing, 0.1m Shielded Cable, Wire Leads.
BII-6060-1000-50-60.6-9.0-MD-2-RG58-BNC BII-6060, 1MHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Molded Housing, 2m RG58 Coax, BNC.
BII-6060-120-6/BII-7566-MD-0.1-SC-WL BII-6060, 120kHz, 6Ω, BII-7566 Transducer, Molded Housing, 0.1m Shielded Cable, Wire Leads.

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.

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