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Frequently Asked Questions
Pole/Zero has developed this FAQ (Frequently Asked Questions) list for your convenience.  If the answer to your question is not yet listed, please go to Contact Us for an online form or give us a call during office hours, 513-870-9060.

General Questions
How do I place an order for a filter?
What kinds of applications do your products have?
Do you have multiple locations?
Where are you located?
Can I visit your facility?
Do you only take military contracts?
Can you custom build to my specifications?
How many employees do you have?
How long have you been in business?
How can I pursue a career with you?
Why should I pursue a career with you?

Technical Questions
Can you custom build to my specifications?
Are the 251 tune positions achieved with individual filters or mechanical tuning?
Are your filters varactor-tuned?
Do you keep filters in stock?
Do you manufacture fixed-tuned and/or Low-Pass or High-Pass filters?
How much RF power can the filters handle?
What filter topology do you use?
What frequency range do the filters cover?

Cosite Analysis Questionnaire
Cosite Analysis Requirements Questionnaire
To help us better help you with your particular cosite issue, please download the Questionnaire below, complete, and fax to 513-870-9064 or email to support@polezero.com.

Download - Cosite Analysis Requirements Questionnaire

General Questions

How do I place an order for a filter?
If you haven’t received a quote for a filter, you will first need to contact our sales department. They will send you a quote that includes pricing and delivery information. You will then need to send a purchase order via fax to 513-870-9064 or by email to contracts@polezero.com.

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What kinds of applications do your products have?
Pole/Zero specializes in low loss, high performance, narrow-band tunable RF filters with applications including: receive preselection and IF filters, receive and transmit LO phase noise improvement, transmit interstage filtering, and sometimes even filtering of the transmit output stage.

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Do you have multiple locations?
No, we do not have multiple locations.

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Where are you located?
We are located in West Chester, Ohio, a suburb north of Cincinnati, and a half hour south of Dayton.

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Can I visit your facility?
Yes. However, we would ask that you first call one of our Business Development Engineers at (513) 870-9060 to discuss your needs. During that initial discussion, we will be happy to schedule an appropriate amount of time for you to visit our facilities.

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Do you only take military contracts?
No, we sell products to be used for commercial applications as well as military applications.

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Can you custom build to my specifications?
Yes, Pole/Zero Engineers have had many opportunities to work with system integrators and radio manufacturers to solve stringent filter requirements.

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How many employees do you have?
We have approximately 200 people working at Pole/Zero Corporation.

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How long have you been in business?
Pole/Zero has been in business since 1989.

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How can I pursue a career with you?
Pole/Zero is always interested in acquiring new talent. To learn more please visit our Careers page.

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Why should I pursue a career with you?
Pole/Zero has the culture, values, opportunities and challenging work that makes a job a career. Pole/Zero has a proven history of superior, innovative products and high caliber, professional people. You can make a difference at Pole/Zero. The quality, talent, leadership and commitment of our employees have been the key factor in our company’s growth. By recruiting the best people, and providing professional development opportunities, we help ensure a bright future for you and Pole/Zero.

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Technical Questions

Can you custom build to my specifications?
Yes, Pole/Zero engineers have had many opportunities to work with system integrators and radio manufacturers to solve stringent filter requirements.

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Are the 251 tune positions achieved with individual filters or mechanical tuning?
Tunability is achieved by switching capacitance on a resonant circuit, and is not designed as a switched filter bank or a mechanically tuned filter. While this complex approach does require a significant number of components, we achieve broad frequency coverage in a small package. Our approach also offers consistency and reliability due to the solid state design.

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Are your filters varactor-tuned?
Although our Micro-Pole filters are varactor based, the primary technology utilized in our standard filter products and integrated cosite equipment is based on PIN Diode switching. PIN Diode switching supports higher power handling, faster switching speeds, etc.

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Do you keep filters in stock?
Due to the large variety of configurations available, filters are typically built to order. We do maintain a large inventory of raw material and can expedite a small quantity of filters in some cases.

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Do you manufacture fixed-tuned and/or Low-Pass or High-Pass filters?
We have matured our processes to support the design and manufacture of digitally tunable bandpass and notch filters. While we have delivered other filter designs in the past, our primary focus is the digitally tunable filter market.

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How much RF power can the filters handle?
Our standard filter products can handle over 200 watts in-band, depending on filter series. Contact us to discuss other solutions for higher power applications.

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What filter topology do you use?
Most tunable filters are 2-pole structures aligned for a Butterworth response. Additional poles of filtering and/or cascades are available to address more stringent selectivity requirements.

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What frequency range do the filters cover?
Pole/Zero designs and manufactures tunable filter products covering 1.5MHz to 3GHz.

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