Wi-Fi Antennas 802.11b/g and 802.11a and 802.11a/b/g antennas

Wi-Fi 2.4 GHz Antenna

The Speed of your wireless connection will vary depending on the strength of the signal you can receive and transmit. Antenna selection can therefore have a significant impact on the speed of your wireless link.

Types of Wi-Fi Antennas 

 There are two basic types of antennas for WLAN and cellular products :

Omnidirectional and directional. The two types are categorized by the direction in which they beam radio signals.

Omni-directional

Omnidirectional Antenna Pattern

Omni-directional antennas are designed to radiate signals equally in all directions. Use this type of antenna if you need to transmit from a central node, such as an access point, to users scattered all around the area. Omnidirectional antenna consist of 2,
Dipole antenna, and

Dipole Omnidirectional Antenna from TPLink Wi-Fi Antenna

Phonetone 6 dB 3G WCDMA Fiberglass Antenna

Fiberglass antenna

Directional Antennas

 

Directional Antenna Pattern

TPLink Directional Wi-Fi Antenna

Directional antennas provide a more focused signal than omnidirectional antennas. Signals are typically transmitted in an ovalshaped pattern with a beam width of only a few degrees. With higher gain, directional antennas can also be used outdoors to extend point-to-point links over a longer transmission distance, or to form a point-to-multipoint network.

Antenna Connectors

N Type Female Connector

PRSMA Connector

MCX Connector

Before you purchase an antenna for your wireless device, you should check the type of antenna connector that your device uses. You will need to buy an antenna with a matching connector. There are several types of antenna connectors, including MCX, TNC, N-type, SMA, and RP-SMA (RP stands for “reverse polarity” or “reverse ping”). On WLAN devices, the most commonly used antenna connector is PRSMA and N-type for IEEE 802.11 wireless applications. Make sure you are buying an antenna with the right connector type.

50 Miles Range Super Thin Amplified Indoor HDTV Antenna from 1byone

The Super Thin Amplified Indoor HDTV Antenna is a great antenna with aesthetic design and suitable for indoor use antenna in your Living Room or other room that you like to install.

I will share my research findings with you. 1Byone Indoor HDTV Antenna come with different range of Antenna , from 25 Miles, 35 Miles, 40 Miles with Stand, 50 Miles, and 55 Miles with Pole . Also there were Amplifier and Amplifier with USB for get better reception if your place far away from Broadcast TV Tower. This High gain TV Antenna Amplifier will help you.Almost 3523 Customers reviews this antenna and the average customer give 4 stars out of 5 for this product.
 
As mention in  Amazon.com , this antenna can received free broadcast High Definition TV Signals such as ABC, CBS, NBC, PBS, and Fox and support 1080 pixel High Definition. It was easily hidden between behind a picture, bookshelf or television.
Fast and easy set up with 3 steps - Unwrap, Plug it in and scan channels.

• Amazon Discount Link

What Negative Comment from Users about This Products ?

Some users convince that this antenna won't work for people who have their TV very fair away from windows. Because the length of the cables on the antenna are simply going to be too short for most people.  If your TV isn't within 2-3 feet of a window facing in the optimum direction, this won't work very well, if at all, for you.

The other major problem is that the suction mount for the antenna is pretty much worthless. It stuck on my window for approximately 15 seconds before falling off.

The antenna does work but you need to really be facing the right direction which can only be determined by trying it out. And the mount is really poor plus the short cables make it mostly unworkable for most people.

Another customer give negative comment about this antenna , "this antenna makes me really disappointed, also the amplifier makes the reception worse than better for most channels. My home is only 6 miles north from Seattle's downtown, using antenna only I can not get local channel 22, 33, 42, etc.; using "antenna + amplifier" I can get sort of reception on channel 22, but the same time worse reception on other channels."
Another customer said that this antenna  "It did not work. It did not increase my signal strength so I returned it "

Positive Feedback about this Antenna

 
 

Simple Transistor Tester with mA meter as Indicator

This Transistor circuit Tester use for testing whether your transistor it still in good condition or not. This circuit of transistor tester using mA meter as an Indicator.

This Transistor Tester use for check whether the transistor tested in good condition or not. If the transistor tested still in good condition, mA meter pin will move , if the transistor tested not in good condition mA meter will not move or steady.
Switch S1 and S2, is sliding switch for setting whether the transistor tested is NPN or PNP.

S3 is sliding switch for set capacity power of mA, in this circuit we use 1 mA meter.
S4 is Push On Switch for giving voltage current to tested transistor.

When we want to tested NPN Transistor, Switch S1 and S2 we connect to Q2 and Q4, and press Push On Switch S4 to test the transistor . If the transistor in Good condition, the pin of mA meter will move to on a number of measurement. If the transistor in not works well , the pin of mA meter will not move .

WSPR Radio Receiver Kit for 20 Meter Amateur Band Model RK-20

• Have fun receiving WSPR signals from around the world.
• Electronic Kit - Soldering and Assembly Required.
• Kit is for Intermediate to Advanced builders - not for beginners.
• Needs PC, USB port, sound card and free WSPR software to operate.
• User supplied antenna is required. No enclosure supplied.

Want some fun receiving specially coded WSPR radio signals from around the world. This receiver may be what you need. A PC with USB port and sound-card is needed. To operate you must install free software (search the web for WSPR software and articles). User supplies antenna wire and ground to operate. Power is taken from USB. The "weak signal propagation reporter" software or WSPR is designed to communicate with low power by Amateur Radio operators. Only 20M WSPR signals may be received with this unit. Photo shows all items in kit. Partially assembled kits may not be returned.
For WSPR software, you can download here for free use.

World Band Radio Antenna

• *The AN-LP1 is not recommended for use with Sony models ICF-SW10, ICF-SW11, ICF-SW77.
• *The AN-LP1 derives power from the radio when connected to Sony models ICF-SW1000T and ICF-SW7600G.

The Sony AN-LP1 portable active antenna is just right for travelers who wants maximum performance from their world band radio. The flexible folding loop antenna is 19 inches (48 cm) when open, but folds down with a twist to a mere 7 inches (18 cm) and neatly fits in the supplied soft carrying case. A mounting clip and suction cup on the end of the loop allows easy placement in a variety of situations. The suction cup is especially useful for mounting the antenna to a window where reception will often be the best. A reselection knob selects operation from 3.85-21.95 MHz. The AN-LP1 requires two AA cells for about 40 hours of use. The supplied cable connecting the loop to the ANl-LP1 control box is 12 feet long. The supplied cable connecting the control box to the radio is 8 inches long. Output is to a 3.5 mm mini plug. Comes with an English, French, German and Japanese instructions from Sony. Item is made in Japan.