DP05A1940TTR RF/IF and RFID

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RF diplexers have found their use in a wide range of applications. One such device is the DP05A1940TTR, enabling cross-over frequencies of 5.41 GHz (Tx) and 4.44 GHz (Rx).
The DP05A1940TTR is a 2.0–3.8GHz/4.4–6.0GHz Duplexer with low losses and high isolation, and is suitable for use in dual antenna systems in both military and commercial applications.

Application Field

The DP05A1940TTR is ideal for use in Radio Frequency (RF) systems where two antennas are used simultaneously. It is used in applications such as military radios, radio communications, and automatic direction finders (ADF).

It is suitable for a wide range of applications, including:

• Tactical radios;
• Airborne communication systems;
• Radar systems;
• Cellular phone base stations;
• Wireless communication systems;
• Satellite communications;
• Antenna diversity systems;
• Multi-band communication systems;
• Broadcast antennas, etc.

The DP05A1940TTR also finds use in handheld radio communications and cellular phone base stations. It is also suitable for use in narrow-band applications such as GPS receivers, wireless local area networks (WLANs), Bluetooth, ZigBee, ISM, NFC and Global System for Mobile Communications (GSM).

Working Principle

The DP05A1940TTR is a wide-band duplex filter. It enables a radio link to exist between two antennas, allowing communication between two radios. The DP05A1940TTR works by passing the radio waves received by the high-frequency antenna to the low-frequency antenna, while blocking the transmissions from the low-frequency antenna to the high-frequency one, and vice versa. In this way, it ensures that the two antennas act as independent transmitters and receivers.

The device utilizes a filtering network to effectively reduce the power loss between the low-frequency and high-frequency antennas. This is done by ensuring that the radio signals sent and received by the two antennas are of the same frequency, and thus eliminating interference between the two. This filtering network also helps in providing high isolation between the two antennas, while ensuring that the mixer in the low-frequency antenna is not overloaded by the signal from the high-frequency antenna.

The device is packaged in a small, surface-mountable, and low-profile package, allowing convenient installation in both military and commercial applications. In addition, the DP05A1940TTR also features a low insertion loss of less than 1.0 dB over its entire transmission range, while providing high isolation of over 40 dB. This makes it ideal for applications requiring high performance with minimal space.

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