Mouse over for menu items
Call us at 1-800-238-2811 for antennas or repeaters
Tutorial Section about improving reception
You are in our Repeater System Learning Center

Repeater Section

Start

Basic Installation

Donor Antennas

Coverage Antennas

Other Issues

Repeater
Differences

Repeater FAQ's

Antenna Section

Index

Basics

Bands and
Frequencies

Gain

Home and
Office

Vehicle
Reception

Pointing an
Antenna

Finding Your
Frequency

Frequently Asked
Questions

Repeater Issues
Other Things to know about repeaters

Custom Applications

Most homes or buildings are easily covered by one of our base repeater systems. Some buildings are larger or have multiple areas inside that need coverage.

You may need longer cables, more than 2 coverage antennas or other items in order to fully cover your building. We can make (almost) any cable length and can help design a system that fits your application. Please call or email us. We're here to help. 1(800) 238-2811

Isolation and Separation

You may have already read this term previously in this tutorial. Isolation refers to the proper distance or separation needed to keep the Donor antenna signal pattern and the Coverage antenna signal pattern away from each other. They must be isolated from each other by separation or other means.

Isolation becomes particularly problematic when omni-directional antennas are used for both the Donor and the Coverage antennas. Since these antennas transmit in a circle (or more accurately a sphere) it is very easy for these spheres to overlap and thus negate the repeater system. Note: All of our repeater systems have isolation control which shuts down the repeater if the donor and coverage antenna patterns overlap. Though you would not achieve any benefit from a repeater system that is in a shut-down mode.

Typically when omni-directional antennas are used for both the Donor and Coverage antennas, a minimum distance (or separation) is specified in order to keep the two antenna signal patterns from overlapping.

dual band repeater system with omni-directional antennas

Isolation is not usually a problem when a directional antenna is used for the Donor and/or the Coverage antenna. Of course, pointing either antenna at the other would cause a problem and should not be done. In addition, since directional antennas have a narrow pattern, compared to an omni-directional antenna, it is unlikely they will overlap when the directional Donor antenna is high up on the building and the Coverage antenna is low inside the building (in most cases).

Isolation for repeater systems

Lastly, isolation can be achieved by the same things that cause reception problems in the first place. Those things being concrete, steel, brick, aluminum, etc. Placing these materials between the antennas prevents their signal patterns from overlapping. For example, your building has a metal roof and you install the Donor antenna above the roof and the Coverage antenna below the roof. The antennas are effectively isolated.

metal roof providing isolation for a repeater system
Next Page - Repeater System Differences
Back to previous page

Repeater System Differences

Cellular PCS GSM antennas, repeaters, amplifiers, connectors and adapters
tlwhite
We gladly accept Visa, Mastercard, American Express and Discover. Our members only section

This Site Copyright 1996-2011 Criterion Cellular. All Rights Reserved. Some logos and graphics used are trademarks of their respective owners. Prices subject to change without notice. Not responsible for typographical or photographical errors. Some products may not be available in all areas. All prices are in US dollars. We reserve the right to modify product pricing and/or specifications without prior notice. We do not sell or rent our customer information - Privacy Notice. Site questions / comments / problems mail to Webmaster

Warehouse Locations throughout the US

.

Home

Antennas

Amplifiers

Adapters

Repeaters

Car Kits

2.4 - 5.8 GHz

Components

Company

Learning Center

Criterion Cellular antennas, Cingular repeaters, amplifiers, Verizon boosters, adapters, cables and signal extenders for Sprint Nextel

Verizon, AT&T, Nextel & Sprint Reception Experts Since 1990

Click Here to Checkout View Cart Contents - Click Here
Comodo SSL Certificate
 

Home

 

What's New

 

Specials

 

Clearance

 

Antennas

 

Glass Mount Antennas

 

Magnetic Mount Antennas

 

Panel Antennas

 

Omni Ceiling Mount Antennas

 

Yagi Antennas

 

1900MHz Grid Antenna High (18dBi)

 

1900MHz Grid Antenna Ultra (24dBi)

 

Nextel Antennas

 

Help

 

Cellular, PCS, Dual Band Amplifiers

 

Amplifier Installation Help

 

--

 

Mobile Repeater

 

Main Page - Index

 

Audiovox (UT Starcom)

 

Ericsson-Sony

 

Handspring

 

HP

 

HTC

 

Kyocera

 

LG

 

Motorola

 

NEC

 

Nextel

 

Nokia

 

Novatel (Merlin)

 

Palm (Handspring)

 

Panasonic

 

Pantech

 

Samsung

 

Sanyo

 

Seimens

 

Sierra Wireless

 

UT Starcom

 

---

 

Connectors

 

Connector Adapters

 

Cables

 

Repeater Main Page-INDEX

 

.

 

--- SMALL REPEATERS 1,000-5,000 Sq. Ft. ---

 

Spotwave Mini Repeater System 1900MHz

 

CM - Dual Band Repeater - Home Office (850-1900MHz)

 

DA - Dual Band Repeater -Small Office (850-1900MHz)

 

.

 

--- MEDIUM 30-50,000 Sq. Ft. ---

 

CM - PCS GSM Repeater 1900MHz

 

CM - Cellular Repeater 850MHz

 

CM - Dual Band Repeater (850-1900MHz)

 

CM - Nextel iDEN Repeater

 

.

 

--- X-LARGE 50-75,000 Sq. Ft. ---

 

C6 - PCS GSM Repeater 1900MHz

 

C6 - Cellular Repeater 850MHz

 

C6 - Nextel iDEN Repeater

 

C6 - Dual Band Repeater (850-1900MHz)

 

.

 

-- CUSTOM DESIGNED REPEATERS -

 

Custom & Larger Repeater Systems

 

.

 

--- EXTRAS / EXPANSION ---

 

Repeater Upgrades - AddOn Antennas

 

Lightning Protection

 

Cables

 

---

 

Mobile Repeater

 

Repeater Tutorial

 

Handsfree Car Kits

 

CARK-91H

 

2.4-5.8 GHz Panel Antennas

 

2.4 GHZ Grid Antennas

 

Splitters/Power Dividers

 

Directional Couplers

 

Lightning Protection

 

Bulk Coax Cable

 

Connectors for Coax Cable

 

Tools for Coax

 

--

 

Pre-Made Cables

 

About Us

 

Contact Us

 

Site Map

 

---

 

Privacy Policy

 

Security

 

Return Policy

 

Shipping

 

Ordering Options

 

International

 

Site Help

 

----

 

Customer
Testimonials

 

Repeater Tutorial - Start Here

 

----

 

Before You Buy - PLEASE READ

 

Installation Instructions

 

Antenna Patterns

 

Interior Spaces

 

Repeater Issues

 

Repeater Differences

 

FAQ's

 

----

 

Start Here

 

Reception Basics

 

Bands & Frequencies

 

What's Gain

 

Determining Frequency

 

For your Home

 

For your Car

 

Index