ANTENNA
SWITCH MODULES
FOR DUAL-BAND PORTABLE PHONES |
Figure 1: Standard module, left, and newly developed module
|
Overview |
Proprietary
Features |
We produce a wide range of antenna
switch modules used in TDMA-type portable phones. We have developed
a module with mounting dimensions of 5.4mm x 4.0mm, approximately
35% smaller than our mass-produced 6.7mm x 5.0mm models. It also
has higher-performance electrical characteristics than standard
devices.
|
- Low insertion loss, especially on receiver side
- High attenuation
- Reduced mounting area, thanks to use of LGA (Land Grid Array)
package type
|
| Direct
Benefits |
Chart 1: Electrical Characteristics
| |
New module |
Standard module |
| EGSM900 (GSM) |
|
|
| Transmission |
Frequency |
880 ~ 915 MHz |
880 ~ 915 MHz |
| Insertion loss |
1.1 dB |
1.1 dB |
| Return loss |
24 dB |
24 dB |
| Double-wave attenuation |
47 dB |
47 dB |
| Triple-wave attenuation |
44 dB |
44 dB |
Isolation between
transmission frequencies |
29 dB |
29 dB |
| High frequency, harmonic output |
91 dBc |
91 dBc |
| Reception |
Frequency |
925 ~ 960 MHz |
925 ~ 960 MHz |
| Insertion loss |
0.6 dB |
0.6 dB |
| Return loss |
20 dB |
20 dB |
| Electrical power maximum allowable
wattage |
4 W Peak |
4 W Peak |
| GSM1800 (DCS) |
|
|
| Transmission |
Frequency |
1710 ~ 1785 MHz |
1710 ~ 1785 MHz |
| Insertion loss |
1.2 dB |
1.2 dB |
| Return loss |
16 dB |
16 dB |
| Double-wave attenuation |
33 dB |
33 dB |
| Triple-wave attenuation |
30 dB |
30 dB |
Isolation between
transmission frequencies |
30 dB |
30 dB |
| High frequency, harmonic output |
85 dBc |
85 dBc |
| Reception |
Frequency |
1805 ~ 1880 MHz |
1805 ~ 1880 MHz |
| Insertion loss |
0.8 dB |
0.8 dB |
| Return loss |
20 dB |
20 dB |
| Electrical power maximum allowable
wattage |
2 W Peak |
2 W Peak |
Figure 2: Block Diagram
|
| Associated
Benefits |
Applications |
Compact size enables this 5.4mm x 4.0mm,1.8mm
high device to contribute to the miniaturization of the portable
phone and encourage its spread and promote more value-added designs.
In addition, because of the decrease in insertion loss at reception,
the built-in antenna is more adaptable.
|
RF parts for multi-band portable
phones
RF parts for Bluetooth® |
| Proprietary
Technologies |
Comparison
with Other Companies Products |
Circuit simulators
Three-dimensional electrical-field analytical simulators
|
Some seven corporations at home and
abroad operate in this field, and competition is fierce. In as much
as accurate comparisons can be drawn, Hitachi Metal's products boast
lower insertion loss and higher performance. |
| Inquiries |
Information System Components Company
Tel.: +81-3-5765-4429
Inquiry Form |
|
