Lucency is a technical term for an area that lets x-rays through tissue and appears darker on the picture. Peri-screw lucency is a result of having had a peri-screw insert â¦ ed into the bone, possibly due to an accident.1 person found this useful. They're is a contraction or shortening of 'they are'.   . Their means belonging to people or things previously mentioned or  easily identified (Your parents do not look similar, except for  their noses).
Amplified antennas are best for the suburbs and rural areas, where a TV signal has to travel a greater distance. They also tend to perform better in rainy or stormy conditions, which can also affect how well a signal travels.
A patch antenna (also known as a rectangular microstrip antenna) is a type of radio antenna with a low profile, which can be mounted on a flat surface.It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane.he impedance bandwidth of a patch antenna is strongly influenced by the spacing between the patch and the ground plane. As the patch is moved closer to the ground plane, less energy is radiated and more energy is stored in the patch capacitance and inductance: that is, the quality factor Q of the antenna increases.