Welcome to Shireen Inc

Shireen, Inc. designs, develops and manufactures components and systems for the Broadband Wireless, SCADA, Military and Telecommunications industries. Our solutions include everything from “mission critical” components for military communication systems to increasing the power of WiFi installations.

What We Offer
Our products are constantly improved to take advantage of the latest technology available. We specialize in custom designs and solutions for all segments of the wireless industry. At Shireen, we make wireless work!
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Finding the Right Cellular Repeater in a 4G World

Posted by Perception System Thursday, September 29, 2011 0 comments
Those who live in areas with limited cellular coverage are all too familiar with the tell-tale signs of poor cell phone reception: dropped calls, poor voice quality, weak signals and poor battery life. In recent years, as cell phone usage skyrocketed, those in rural areas found themselves limited to just a few carriers with spotty coverage in their area. Then, along came 3G cell boosters. Cell phone signal boosters for the 850MHz and 1900MHz bands have proliferated the market, offering improved voice quality, fewer...

What is a Voltage Controlled Oscillator (VCO)?

Posted by Perception System Tuesday, September 27, 2011 0 comments
Voltage controlled oscillators are commonly abbreviated as VCO. The VCO's are electrical circuits that yield an oscillatory output voltage. A VCO is an oscillator whose output frequency is proportional to the applied input voltage. The parts of a VCO circuit has a LC tank circuit with an inductor(L) and a capacitor(C) along with one or two transistors accompanied by a buffer amplifier. A VCO gives a periodic output signal where the output signal parameter is directly related to level of input control voltage. The center frequency...

10Watt 2.4 GHz to 1.8GHz Simple Frequency to Voltage Converter Circuit

Posted by Perception System Monday, September 26, 2011 0 comments
10Watt 2.4 GHz to 1.8GHzFrequency Converters UDC 2418-10 This UDC converts any 2.4GHz radio to 1.8GHz unit for use in military applications. With 10 Watt output, the range can be extended by several folds. Ideal for applications where space is limited and higher power output is required. Buy 10Watt 2.4 GHz to 1.8GHz Here! Download Specifications Product Spec #UDC2418-10 Product Information For more information about...

Cable Television As a Main Telecommunications Transport Medium

Posted by Perception System Thursday, September 22, 2011 0 comments
There are many choices for broadband service providers and the technologies they offer. Cable Television Systems throughout the world use multiple network architectures to deploy their services. One of the most prevalent ones is referred to as HFC (Hybrid Fiber Coax) this is known as a closed system network. That is to say, the signals are not transmitted through the air. They are sealed within a combination of fiber optic and coaxial cables. The technology has been around since the early 1980s. It has undergone major...

Insight into RF Amplifier and Things to Consider when Selecting Them

Posted by Perception System Tuesday, September 20, 2011 0 comments
You are often suggested to buy RF amplifier when you are out there planning to buy a radio. Know why? Because amplifiers are simple devices which enhance the sound quality you receive from audio devices. RF (radio frequency) amplifiers are especially designed to go with radios. They receive varied input signals in the form of current, voltage or others and transform them into output signals with larger amplitude based on the input signal.Though both the input and the output devices use different circuits, signals received and...

RF Converter – Energy Saving Device Make Your Life Easy

Posted by Perception System Sunday, September 18, 2011 0 comments
Now-a-days, the demand for frequency converter or frequency charger has been increased in many industries. The reason for this it’s fairly obvious, industries around the world need energy-saving devices in a variety of industrial applications and the frequency converters are of great help to solve the problem considerably. In a couple of years, the markets of frequency converters are expected to increase by fourfold its present size.Frequency...

5 Watt 2.4 GHz to 1.8 GHz 3 Phase Rotary Frequency Converter

Posted by Perception System Saturday, September 17, 2011 0 comments
5 Watt 2.4 GHz to 1.8 GHzFrequency Converters UDC 2418-05 This UDC converts any 2.4Ghz radio to a 1.8GHz unit for use in military applications. This 5 watt version, offers a high power solution in a small package. Ideal for mobile applications. The unit requires proper heat sink if used in stand alone configuration. Also available in 10 Watt and 50 Watt versions. Buy 5 Watt 2.4 GHz to 1.8 GHz today Download Specifications Product...

10 Watt 2.4 GHz to 900 MHz High Frequency Converter Circuit

Posted by Perception System Wednesday, September 14, 2011 0 comments
10 Watt 2.4 GHz to 900 MHz Frequency Up/Down Converter This Up-down converter (UDC) converts any 2.4GHz radio to 900MHz unit and amplifies power to 10 watt. Thus allowing users to take advantage of lower band with better penetration. The added high output power (10 Watts) increases the coverage by many folds. Buy 10 Watt 2.4 GHz to 900 MHz Here! Download Specifications Product Spec #UDC2409 Product Information For more information...

How to Choose a Cell Repeater

Posted by Perception System Tuesday, September 13, 2011 0 comments
You're tired of experiencing poor cell phone reception, dropped calls and poor voice quality. You get some reception outside your home or office, but as soon as you step inside it seems to magically disappear. Your phone is constantly scanning for a signal, so your battery dies much faster than it should. You've double checked your phone and called your carrier, all to no avail. You need a cell phone signal booster. How Cell Repeaters Work Cell repeaters, also known as cell amplifiers, cell extenders or cell boosters,...

DC Stop / DC Block

Posted by Perception System 0 comments
DC Stop / DC Block This DC stop prevents DC voltage from being shorted in power over coax systems, where mast head amplifier is not used.  Typically the mast head amplifiers are fed power over coax via Bias T, feeding power to multiple antennas in 900Mhz and 1.8GHz bands. This DC stop is needed if power is fed up the tower without using amplifier at any antenna.   The unit provides excellent loss & VSWR characteristics...

RF Power Amplifier – Enhances Your Signal Strength and Efficiency

Posted by Perception System Sunday, September 11, 2011 0 comments
Amplifier is a device used to increase the dimension of a signal. This is a one kind of relationship between input & output amplifier, which is signified in terms of the input frequency known as transfer function and the volume of output to the input is called in reinforcements, usually measured in decibels.These conditions are best suited to "electronic amplifier." A unit of the amplifier is signifying as voltage or current. There are various amplifiers available in the market, but RF Power Amplifier is one of the most...

Coax Cables - A Look Into Its Various Components and Principles

Posted by Perception System Thursday, September 8, 2011 0 comments
Coax cables are used in radio frequency transmission and in applications where receivers, transmitters and antennas are used. Part of its basic tasks is to strengthen signals of particular types of gadgets. The device works in processes dictated by coaxial technology. Coax cables come in several designs as well. Knowing about the components of these designs will give you an idea of how it actually looks like....

Miscellaneous Connectors

Posted by Perception System Wednesday, September 7, 2011 0 comments
Miscellaneous Connectors We offer a variety list of standard and custom connectors: Connector for Proxim AP600 Hirose U.FL for 802.11 g and a radios Lucent MC card connector MCX , right angle, LMR100A MCX- Straight- male- LMR100A MMCX connector for RG316/LMR100A MMCX RP for LMR100A AISG 8 Pin Female AISG 8 Pin Male PL259 Male for LMR600 PL259 Male for LMR400 Buy Miscellaneous Connectors today Product Information For more information...

TNC Connectors

Posted by Perception System 0 comments
Shireen, Inc. TNC Connectors We offer the following standard and custom TNC connectors: TNC female, RG58/LMR195 TNC male RG58/LMR195 TNC RP female for RG316/LMR100A TNC RP female for LMR400 TNC RP female for LMR600 TNC RP male for RG316/LMR100A TNC RP male for LMR400 TNC RP male for LMR600 TNC RP male for RG8X/LMR240 TNC RP male, RG58/LMR195 TNC male, LMR 400 TNC male for RG8X/LMR240 TNC female for RG8X/LMR240 Buy TNC Connectors...

Type N Connectors

Posted by Perception System Tuesday, September 6, 2011 0 comments
Shireen, Inc. TNC Connectors We offer the following standard and custom Type N connectors: Type N Female for RG58/LMR195 Type N Female Bulkhead for 1.13 mm cable Type N Female, 4 hole flange, 0.5″ Type N Male for RG58/LMR195 Type N, Female Bulkhead for RG316/LMR100A Type N Female for LMR400 Type N Female for LMR600 Type N Female for RG8X/LMR240 Type N Male for LMR400 Type N Male for LMR600 Type N Male for RG316/LMR100A Type...

SMA Connectors

Posted by Perception System Monday, September 5, 2011 0 comments
SMA Connectors Shireen, Inc. SMA Connectors We offer the following standard SMA connectors: SMA female for LMR400 SMA female, RG316/LMR100A SMA female, RG58/LMR195 SMA male for RG8X/LMR240 SMA male for LMR400 SMA male RP for RG58/LMR195, right angle SMA Male straight, RG316/LMR100A SMA male, Straight, RG58/LMR195 SMA RP female for RG316/LMR100A SMA RP female for LMR400 SMA RP male for LMR400 SMA RP male, RA, RG316/LMR100A Buy SMA...

Waterproof RJ45 Connector Assembly Kit

Posted by Perception System Sunday, September 4, 2011 0 comments
Waterproof RJ45 Connector Assembly Kit RJ45 Waterproof connector assembly for harsh environmental conditions.Buy Waterproof RJ45 Connector Assembly Kit todayDownload Specifications Product Spec #99-502Product Information For more information about our products, please contact us directly at 301.838.4380 or email us at sales@shireeninc....

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