DF-B 1.2 GHz Diplex Filter

Query


SQDF-B 1.2GHz Diplex Filter is a complete diplex filter with 75 Ohm at all ports. This filter isolates the forward and reverse bands so that the two signals can share the same coax band width. The reverse path frequencies pass through the low-pass filter which has a cutoff frequency of 65/85/204 MHz, and the forward path frequencies pass through the high-pass filter which has a cutoff frequency of 87/105/258 MHz. The high-pass filter works up to 1.2 GHz. Each of these filters, together with additional filtering provided on the amplifier motherboards, has enough isolation to prevent the amplifier from oscillating. It also provides enough isolation so that there is no interference between the forward and reverse path.

These accessories can be used for nodes, amplifiers, line extenders, etc.


Item

Units

65 / 87

85 / 105

204 / 258

FrequencyRange

MHz

5 - 65 / 87 - 1218

5 - 85 / 105 - 1218

5 - 204 / 258 - 1218

Insertion Loss

dB

0.2 (Min)

@5-65M

@87-1218M

0.2 (Min)

@5-85M

@105-1218M

0.2 (Min)

@5-204M

@258-1218M

1.5 (Max)

1.5 (Max)

1.5 (Max)

Isolation

dB

40

@5-65M

38

@5-85M

30

@5-130M

35

@65-87M

26

@85-105M

26

@130-258M

38

@87-1002M

43

@105-1002M

38

@258-1002M

30

@1002-1218M

40

@1002-1218M

35

@1002-1218M

Return Loss

dB

20

@5-65M

@87-1002M

20

@5-85M

@105-1002M

20

@5-204M

@258-1002M

17

@1002-1218M

17

@1002-1218M

17

@1002-1218M

Impedance

Ω

75

 

Note: Unless otherwise noted, all specifications reflect typical performance and are referenced to 68°F (20°C). 


Description

Part Number

 SQDF-B 1.2 GHz 65/87 SMD Diplex Filter

9909000100

 SQDF-B 1.2 GHz 65/87 (M) SMD Diplex Filter

9909000200

 SQDF-B 1.2 GHz 85/105 SMD Diplex Filter

9909000101

 SQDF-B 1.2 GHz 85/105 (M) SMD Diplex Filter

9909000201

 SQDF-B 1.2 GHz 204/258 SMD Diplex Filter

9909000102

 SQDF-B 1.2 GHz 204/258 (M) SMD Diplex Filter

9909000202

About Us

SQ Electronic Equipment Co., Ltd is a technology enterprise specialized in R&D and manufacturing of CATV and PDU related products. The history of the company goes back to 1991. Originally it was a Shanghai based company（ShangHai QianJin Electronic Equipment Co., Ltd). Due to the rapid development of business activities and customer needs, established a 17000 square meter manufacturing base in Suzhou(Qianjin Electronics (Suzhou) Co., Ltd.). Due to strategic upgrading and development, SQ Electronics (Suzhou) Co., Ltd was established in September 2024 and officially switched, embarking on a new journey of cooperation.

Currently it has about 100 employees. Among them, more than 30% are engineers and technicians. The company has inherited the core team, technology, resources, and experience of the original company, and is committed to further innovation and development on the existing basis.

SQ products are well accepted in the industry because of our high quality and innovative design. Quality is our number one priority, and our goal is to supply world class products through outstanding service to our customers and partners.



Contact

   Address: No. 5 Qidu Avenue Suzhou City Jiangsu Province China(within Qianjin Electronics (Suzhou) Co., Ltd.)

   Phone: 021-54973555

   Email: eddy@sq-cabledevice.com