GSM chip antenna design mistakes in detail I. Size of the ground plane The length of the distance marked with I is 56 mm only. Most GSM chip IFA antennas or PCB track antennas will radiate perfect on an estimated length of the PCB of 90 to 100 mm. Just compare it with the length […]
GSM antenna designs mistakes in details I. Size of antenna ground plane If you compare the simulation of the GSM antenna in the IoT M2M Cookbook with the antenna at the picture, then you will understand that the antenna efficiency at GSM 850/900 will be poor, because the PCB is already much to short. Nobody […]
Embedded chip antenna design example Chip antenna mulitband – inverted F antenna Type: Inverted F antenna on chip Multiband GSM 850 / 900 / 1800 / 1900 / UMTS 2100 Tuning by matching circuit Size of antenna free space: 13.5 mm x 30 mm Size of whole PCB: 45 mm x 80 mm (reference design […]
Embedded antenna design mistakes Type: Meander with spiral Multiband (or GSM 900 / 1800 or GSM 850 / 1900) Not easy to tune on center frequency because the 900 MHz part goes straight to the 1800 MHz part Not easy to tune on antenna impedance The GSM antenna structure at the picture is a shape […]
Embedded antenna design examples PCB antenna dualband – inverted F antenna Type: Inverted F antenna Multiband (e.g. GSM 900 / 1800 or GSM 850 / 1900) Easy to tune on center frequency Easy to tune on antenna impedance Size of antenna structure: 50mm x 10 mm Size of ground plane: 50 mm x 90 mm […]
GSM PIFA antenna flying over ground A picture can tell more than a thousand words. I do not remember how often I have drawn such a sketch at a customer’s office. It is time to change this waste of time and to start with an antenna proposal gallery online. The GSM PIFA antenna is “flying” […]
Wrong desigend GSM GPS Tracker The two yellow bars on the screen of the vector network analysers mark the – 6 dB return loss target for GSM 900 and GSM 1800. In the lower GSM 900 band the antenna is far away from the -6 dB. The GSM antenna is not an antenna. It is […]
Ceramic embedded LTE antenna This LTE antenna with is very detailed documentation is a good example to explain the working of ceramic antennas on a PCB with different size of ground plane. I. Embedded LTE antenna efficiency The antenna is resonating in all major LTE, GSM and HSPA bands and on Wi-Fi 2400 MHz and […]
Selection of ceramic GSM chip antenna I. Size of GSM ceramic chip antenna The size of the ceramic GSM chip antenna is 21 x 7 x 3 mm only. The distance for the selected ceramic chip antenna to the ground plane has to be to be 7 mm. There is a need for a gap […]
Customisted antenna design example for GSM watch Meandered monopole antenna Type: Inverted F antenna on chip Dualband GSM 900 / 1800 Tuning by extrem customisation Size of antenna: Round shape with a diameter of estimated 30 mm Size of whole PCB: 25 mm diameter This GSM watch was planned for mass production. Unique features of […]