Sunday, September 27, 2009

Lokasi Antenna Mobile yang sesuai

Radiation Pattern of Mobile Antennas

Most people think that antennas mounted on vehicles are omnidirectional. This is mostly true, but the radiation pattern is influenced greatly by the body of the vehicle. Remember we stated that the body acts as the "radials" for the antenna? Well, we know that the body does not extend around the base on the antenna equally. Figure 2 shows how the radiation pattern of a whip is influenced by the body of the vehicle. As you can see, the shape of the pattern depends on where you mount the antenna. The pattern is "pulled" to areas where there is the most vehicle body. The pattern is the worst in directions where there is no metal body for a radial.



Wednesday, September 16, 2009


SELAMAT HARI RAYA DAN MAAF ZAHIR BATIN KEPADA SEMUA WARGA HAM TAK KIRA DI MANA ANDA BERADA.

DARIPADA AJK ASTRA DAERAH JOHOR BAHRU, JOHOR

Monday, September 14, 2009

TERIMA KASIH KERANA MENGUNJUNGI LAMAN BLOG ASTRA JOHOR, DAERAH JOHOR BAHRU

JIKA ANDA INGIN MENJADI AHLI ASTRA, BOLEH MASUKKAN MAKLUMAT ANDA DI BORANG YANG DISEDIAKAN. SILA BUAT CATATAN MOHON MENJADI AHLI DIRUANG ALAMAT.

JIKA ANDA SUDAH MENJADI AHLI ASTRA, SILA KEMASKINI MAKLUMAT ANDA. TERIMA KASIH.

SILA KEMASKINI KEAHLIAN ASTRA ANDA

ATAU MUNGKIN ANDA INGIN BERGABUNG DENGAN ASTRA JOHOR