About Pole/Zero

Pole/Zero analyzes, designs, builds and supports interference mitigation and spectral purification solutions for industrial and defense manufacturers and integrators of RF/microwave electronics.

Saving Lives

Communication equipment in close quarters such as commercial and military aircraft, ship, and ground vehicles can experience severe RF interference issues. This can often result in serious consequences, especially in defense electronics.

In this cosite environment it is difficult to adjust acceptable transmit power, and receive sensitivity to acceptable levels simultaneously. As a result the receiver may lose weak signals at a critical time.

Pole/Zero designs and manufactures RF filters to control this cosite related problem. With its full line of digitally tunable RF filters including bandpass filters (NANO-POLE®, MICRO-POLE®, MINI-POLE®, MAXI-POLE®, POWER-POLE® and MEGA-POLE®), notch filters and Integrated Cosite Equipment (ICE) Pole/Zero can effectively solve most interference issues.

Since 1989, Pole/Zero has developed and fielded products to expand the linear dynamic range of communications products from 1.5 MHz to 3 GHz. Success in providing customers with quality products and services has resulted in continued growth since it was founded in 1989. Through constant product, technology, and process development, Pole/Zero continues to expand its role as the leading supplier of unique, cost-effective solutions to solve difficult RF problems.

To learn more about communication interference issues read:
by Timothy Harrington

About Dover

Defining Power

Dover is a diversified global manufacturer and solutions provider with annual revenue of approximately $8 billion. We deliver innovative equipment and components, consumable supplies, aftermarket parts, software and digital solutions, and support services through five operating segments: Engineered Products, Clean Energy & Fueling, Imaging & Identification, Pumps & Process Solutions and Climate & Sustainability Technologies. Dover combines global scale with operational agility to lead the markets we serve. Recognized for our entrepreneurial approach for over 65 years, our team of over 25,000 employees takes an ownership mindset, collaborating with customers to redefine what’s possible. Headquartered in Downers Grove, Illinois, Dover trades on the New York Stock Exchange under “DOV.”

Additional information is available at dovercorporation.com.   


Experience Victory

Pole/Zero designs and manufactures a comprehensive suite of RF interference mitigation products including tunable filters, Integrated Cosite Equipment (ICE), Low Noise Amplifiers, cosite power amplifiers and other products that are ideal for solving communication problems caused by various types of RF interference. These interfering sources can include self-interference due to collocation of transmitters and receivers (known as cosite interference), intentional jammers, broadband noise, spectral splatter and spurious transmit signals, rusty bolt effects or any number of other sources.

The company was founded in 1989 with the belief that the military and commercial RF markets were changing. Although military budgets were shrinking, the role and the requirements of the military were not. In fact, one might argue that the role of the conventional military would be expanding with the global police force and peacekeeping pressures that were being applied. At the same time, real battlefield situations demonstrated that commercial equipment could provide the sophistication and reliability required in a military environment.

Using state-of-the-art technology, we focused on the technological advances of the last couple of decades and applied them to solid-state tunable filters. The result was a leap forward in miniaturization and standardization, permitting a totally self-contained single structure with improved production capability and reduced cost.

In addition to these filters, we have developed other building blocks such as low noise amplifiers, cosite power amplifiers, solid state switches, mixers and synthesizers that now make up a catalog of “Off-The-Shelf” building blocks. These building block modules are available to the industry as stand alone modules, and they also form the basis of the systems we supply. These products share a common attribute in the support of very high dynamic range communications.

In 1994 Pole/Zero branched into the Integrated Cosite Equipment (ICE) business with the development of both an airborne and shipboard filter/amplifier cascade product. ICE integrates elements of our tunable filters to achieve enhanced performance beyond that achievable with our basic products. Both of these ICE units are still in production. Additionally, Pole/Zero has significantly expanded the breadth of ICE products, providing our customers the ability to select optimal cost-effective solutions for their interference mitigation needs. Many of our products are purchased as Commercial Item solutions, while other customers require modification to the existing products to meet their needs. In both cases, Pole/Zero provides low risk, cost-effective solutions. Our products can be found in the harshest RF environments on C4ISR (command, control, communications, computers, intelligence, surveillance, and reconnaissance) platforms and in less demanding applications in tactical radios.

Today, Pole/Zero is delivering hardware to customers around the world for a variety of applications. Our equipment is flying on airborne command posts and jet fighters for the military, and is fielded in both ground fixed and ground mobile systems. The same hardware is being used in commercial applications from radio telescopes to wireless office communications, and from industrial inspection equipment to MRI machines. Applications for our filters range from stand-alone units in a test environment to units embedded in the design of high performance communication equipment.

As we continue to grow in number of employees and yearly sales, we have maintained our focus on supplying readily available digitally tuned frequency hopping filter modules and components with wide dynamic range performance to provide new flexibility to the RF system designer.

Our Facilities

Pole/Zero has an 63,000+ square foot facility, which provides space for Engineering Design Labs, Production and Environmental Test Facilities. Pole/Zero has deployed an Integrated Enterprise System to support each of these primary disciplines.


Pole/Zero’s Engineering design labs have capabilities including:

  • Multiple RF Screen Rooms
  • Full Complement of Test Equipment (DC – 3GHz) including Network, Spectrum, and Modulation Analyzers; Signal and Function Generators
  • Eagleware GENESYS™RF/Microwave Design Tool together with SPECTRASYS™, an RF architecture simulator and EMPOWER/ML™, a multi-level planar 3D EM simulator
  • MathCAD13 for circuit simulation and analysis
  • Mentor Graphics DxDesigner Schematic Capture & Circuit Board Layout Tool
  • Autodesk Inventor® Series including:
    1.Autodesk Inventor® software for 2D/3D design and documentation
    2.AutoCAD® Mechanical for productive 2D drawing and detailing
    3.Autodesk® Vault to synchronize your design efforts


  • Conceptual design through production
  • Juki Model KE-3010L and Model KE-3020L Precision SMT Assemblers
  • Heller Model 1800W Reflow Oven
  • Yes Tech YTV-2050 Automated Optical Inspection unit
  • DEK Horizon 03iX Screenprinter
  • Glenbrook Technologies Model JB70T X-Ray Equipment
  • Customer satisfaction, quality, and continuous improvement are the personal responsibility of each employee

Environmental Test Facility

  • Custom developed test fixtures for automated testing of customer units
  • Temperature/Humidity chambers capable of thermal cycling units under test from -73°C to +175°C. Pole/Zero currently has multiple thermal chambers including the TestEquity 115, TestEquity 1007C, Russells F-18, Russells RB-32 and Russells RDV-32 chambers
  • MB Dynamics C10E, LDS V830 and V850 Electrodynamic vibration tables for shock, random, & sinusoidal testing cycles

Corporate Governance