Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Sonar Transducer Impedance Matching and Tuning

Impedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance Matching and TuningImpedance 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.

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

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, ...
   
Network BII-6010
Type: Single-ended, Input/Output Isolated. Impedance Matching & Tuning at Single Frequency.
Input Terminal: 2
Output Terminal: 2
Available Frequency: 30Hz to 10MHz
Power Amplifier Type: BII-6010 can work with following Power Amplifiers:
Linear Power Amplifier, Switching Power Amplifier and RF Power Amplifier whose output is of Single-ended, Differential/Bridge, Half-bridge or H-bridge/Full-bridge.
Power Capacity: 10W to 2000W
Insulation: > 500MΩ@1000 VDC
Housing: 1. Molded (MD): Plastic Housing, no mounting holes.
2. Metal (MT): Enclosed (Shielded) with metal housing. four slots for mounting and Grounding.
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). Both input and output are wire leads.
2. MIL-5015 style (5015). Both input and output are MIL-5015.
3. BNC Male (50Ω) (<50Vrms ONLY) (BNCBNC): Both input and output are 50Ω BNC male.
4. Input: Wire Leads, Output: BNC Male (50Ω) (<50Vrms ONLY). (WLBNC).
5. Input: Binding Post, Output: Binding Post. (BPBP) (for metal housing ONLY)
6. Input: Binding Post, Output: BNC Male (50Ω). (BPBNC) (for metal housing ONLY)
7. Input: Banana Plug, Output: Banana Jack. (BPBJ)
8. 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.
Notes on Input Terminals: If input terminal of BII-6010 is BNC, BII-6010 can ONLY be used with power amplifiers whose output is of single-ended or half-bridge, and it can NOT be used with power amplifiers whose output is of differential/bridge or H-bridge/Full-bridge.
Molded Housing Size: ΦDxH: from 33x20mm to 68.5x140mm, or customized to meet power rating.
Metal Housing Size: LxWxH: from 115x39x56mm to 138x61x56 mm or customized to meet power rating. Four mounting holes.
Weight: 100 g to 2 kg
Integration: BII designs transducers with embedded BII-6010 inside transducer housing. Please refer to specific transducer webpage for more details.
Warning: Standalone BII-6010 Matching Networks are designed for embedded application and must be installed or mounted inside a firmly grounded enclosure by buyers at buyer's cost for operation safety.
   
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-6010-120-5-2.2-1.1-MT-BPBP BII-6010, 120kHz, 5Ω, Transducer G=2.2mS, B=1.1ms, Metal Housing, Input & Output: Binding Posts.
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-6010-300-50-60.6-9.0-MD-WLBNC BII-6010, 300kHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Molded Housing, Input: Wire Leads, Output: 50Ω BNCs.
BII-6010-500-50-60.6-9.0-MT-BPBNC BII-6010, 500kHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Metal Housing, Input: Binding Post, Output: 50Ω BNC.
BII-6010-1000-50-60.6-9.0-MD-2-RG58-BNCBNC BII-6010, 1MHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Molded Housing, 2m RG58 Coax, 50Ω BNC.
BII-6010-1000-50-60.6-9.0-MT-BNCBNC BII-6010, 1MHz, 50Ω, Transducer G=60.6mS, B=9.0ms, Metal Housing, Input & Output: 50Ω BNCs.
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.

Wiring

Note: for BII-6010 with wires/wire leads or shielded cable/wire leads, please refer to the datasheet enclosed with the shipment.

BII-6010 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

BII-6010 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.

BII-6010 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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